Octopath Traveler 0 Mastery guide – Where to find all Skill Masteries

In Octopath Traveler 0, you won’t be limited to a handful of skills. You can learn plenty of other skills outside of your starting list—but that’s only if you can find and equip the Mastery for them.

Most Masteries are tough to acquire. Many are guarded by Elite Enemies, while others must be purchased for exuberant sums, fought for from NPCs, or found hidden around the map. Occasionally, you might see one pop up in Ludo’s store in Wishvale if you’re lucky (and if you’ve unlocked several Trade Lists). When you’ve unlocked all of a companion’s skills, you can also spend JP to unlock the Mastery for that skill to then equip it on another character.

If you’re looking for a specific Mastery, you’ve come to the right place. We’ve put together a list of all the Masteries in Octopath Traveler 0, both active attacks and supporting ones. Some of these Masteries can appear in more than one place, and we’ve included only locations we were able to confirm for ourselves.

This article is a work in progress. We will add more Mastery locations as we find them.

All Battle Masteries

Battle Masteries, as their name might suggest, can be used in combat just like any regular old skill. Many of these Masteries can be acquired once you’ve unlocked all of your companions’ skills, while others are found in NPC inventories or in Blue Chests. Here are all the Battle Masteries in Octopath Traveler 0, sorted by the damage type.

Name	Type	Type of Damage / Effect	Location
Brutal Sweep	Sword	Deal Sword damage to all foes 2 time(s).	Defeat Tytos the Thunderblade.
Downward Slash	Sword	Deal Sword damage to a foe.	Contend with Scarlet Wing Admirer (Danger Lv. 9) in Emberglow.
Flash of Malice	Sword	Deal great Sword damage to all foes.	Contend with Kindly Old Man (Danger Lv. 50) in Sunshade. Defeat Guardian of the Tainted Flame.
Helmcleaver	Sword	Deal Sword damage to a foe and lower Physical Defense for 2 turn(s).	Entreat from Soldier Guarding Entrance at Theatropolis.
Reaper’s Blade	Sword	Deal Sword damage to all foes and gain a small chance to instantly kill target.	TBD
Reckless Strike	Sword	Deal great Sword damage to a foe. More potent if attacking from the back row.	In a Blue Chest behind an Elite Enemy in Sweltering Cave.
Torrential Strike	Sword	Deal Sword damage to random foes 4 time(s).	Contend with Gakko (Danger Lv. 39) in Grandport: Estate Entrance.
Trifold Slash	Sword	Deal Sword damage to a foe 3 time(s).	Contend with Tireless Soldier (Danger Lv. 42) in Shepherds Rock.
Twofold Slash	Sword	Deal Sword damage to a foe 2 time(s).	Contend with Lutus (Danger Lv. 24) in Wishvale.
Vacuum Slice	Sword	Deal great Sword damage to a foe.	Contend with your father in Wishvale.
Vengeful Blade	Sword	Counter physical attacks with a sword 2 time(s). Lower Shield Points with counter regardless of target’s weak points.	Steal from Reime during Victors Hollow Arena fight. Unlock Mastery in Reime’s skill menu.
Assault	Polearm	Deal Polearm damage to all foes. More potent if attacking from the back row.	Contend with Self-Indulgent Bovine (Danger Lv. 27) in Clearbrook (requires upgraded Sacred Flame Dais).
Hya! Hya! Hya!	Polearm	Deal Polearm damage to random foes 3 time(s).	Contend with Mont d’Or (Danger Lv. 50) in Victors Hollow Arena Gate.
Judicious Blade	Polearm	Nullify own positive status effects, then deal Polearm damage to a foe. More potent the more status effects nullified.	Defeat Reime in Victors Hollow Arena. Unlock Mastery in Reime’s skill menu.
Lunar Arc	Polearm	Deal great Polearm damage to all foes, then move to the back row.	Entreat from Chatty Housewife in Shepherds Rock.
Peerless Strike	Polearm	Deal great Polearm damage to a foe.	Unlock Mastery in Tressa’s skill menu.
Spear Sweep	Polearm	Deal Polearm damage to all foes.	In a chest in Snowbloom Ruins.
Spear Whirl	Polearm	Deal Polearm damage to all foes 2 time(s).	Contend with Town Watchman (Danger Lv. 48) in Sufrataljah. Purchase from Ludo with Wishvale Trade Goods List.
Twin Strike	Polearm	Deal great Polearm damage to a foe 2 time(s).	Defeat Oskha the Have-Not.
Assassination	Dagger	Deal great Dagger danger to a foe. More potent if attacking from the back row.	Purchase from Unemployed Maid in Sufrataljah (130,000 or 65,000 Leaves).
Blade of Vengeance	Dagger	Deal Dagger damage to a foe. Lower Shield Points by 1 even when not striking weak point.	Defeat Auguste the Prince of Thieves.
Dancing Leaves	Dagger	Deal Dagger damage to all foes 2 time(s).	In a chest in Hell: Valore tavern.
Dagger Dance	Dagger	Deal Dagger damage to all foes.	In a chest behind Elite Enemy in Herminia’s Manse: Entrance.
Double Edge	Dagger	Deal Dagger damage to a foe 2 time(s).	Unlock Mastery in Bargello’s skill menu.
HP Thief	Dagger	Deal Dagger damage to a foe 2 time(s) and steal HP equal to 50% of damage dealt.	Unlock Mastery in Therion’s skill menu. Defeat Sonia.
Lethal Thrust	Dagger	Deal great Dagger damage to a foe 4 times.	Contend with Bloodthirsty Rabbit (Danger Lv. 50) in Atlasdam (requires upgraded Sacred Flame Dais).
Reaping Slash	Dagger	Deal Dagger damage to a foe.	Defeat Heidne outside of Sunshade.
Reaping Thrash	Dagger	Deal great Dagger damage to a foe.	In a Blue Chest behind Elite Enemy in Cave of Origin.
Serpent’s Fang	Dagger	Deal great Dagger damage to a foe and gain a chance to inflict poison for 2 turn(s).	Defeat M’suhi the Viper in the main storyline.
SP Thief	Dagger	Deal Dagger damage to a foe 2 time(s) and steal SP equal to 5% of damage dealt.	Unlock Mastery in Therion’s skill menu.
Surprise Attack	Dagger	Deal Dagger damage to a foe. More potent the sooner you act that turn.	Contend with Hound of Power (Danger Lv. 34) in Donescu weapons shop. In a chest in West Theatropolis Plains.
Tri-Edge	Dagger	Deal Dagger damage to a foe 3 time(s).	Defeat Dreige in Therion’s quest. Unlock Mastery in Bargello’s skill menu.
Utsusemi Dance	Dagger	Deal great Dagger damage to random foes, then move to the back row.	In a chest behind Elite Enemy in the Outersea.
Wild Knives	Dagger	Deal Dagger damage to random foes 5 time(s).	In a Blue Chest in Finesand Ruins.
Boomerang Toss	Axe	Deal Axe damage to random foes 2 time(s).	Entreat from Gertas at Clearbrook.
Fading Strike	Axe	Deal Axe damage to a foe 3 time(s). Restore own HP if attacking from the back row.	Contend with Formidable Woman (Danger Lv. 45) in Victors Hollow: Arena Gate. In a Blue Chest behind Elite Enemy in Sea Cavern.
Last Stand	Axe	Deal Axe damage to a foe. Deal more damage the less HP you have.	Contend with Once-Aspiring Knight (Danger Lv. 40) in Shepherds Rock. In a Blue Chest behind Elite Enemy in Misty Falls.
Spinning Axe	Axe	Deal axe damage to all foes.	TBD
Spiral Swing	Axe	Deal great Axe damage to a foe 2 time(s).	Purchase from Ludo with Victors Hollow Trade Goods list.
Thundering Cleave	Axe	Deal Axe damage to random foes 4 time(s).	Entreat from Thoughtful Man in Flamesgrace Cathedral: Entrance.
Arrow Volley	Bow	Deal great Bow damage to all foes.	Purchase from Nimble Carpenter in Shepherds Rock: Castle Square (79,000 or 40,000 Leaves). In a chest behind Elite Enemy in Subterranean Arena (Victors Hollow).
Double Shot	Bow	Deal Bow damage to a foe 2 time(s).	Contend with Karan (Danger Lv. 29) in Wishvale.
First Shot	Bow	Deal Bow damage to a foe. Next attack is guaranteed to be a critical hit.	Contend with Birdian Researcher (Danger Lv. 29) in Cragspear.
Radiant Arrow	Bow	Deal great Bow damage to a foe.	Defeat Herminia the Huntress.
Rippling Blow	Bow	Deal Bow damage to random foes 4 time(s).	Contend with Dmitri (Danger Lv. 20) in Hunter’s House outside of Emberglow. Contend with Hunter Guarding the Town (Danger Lv. 50) outside of Cathedral of Tytos (during Bestower of Fame). In a chest behind Elite Enemy in Hell: Path to White Grape Hill.
Rippling Shot	Bow	Deal great Bow damage to random foes 4 times.	Contend with Phenn (Danger Lv. 21) at Wishvale (requires Amity Lv. 3).
Stream of Arrows	Bow	Deal Bow damage to a foe 5 to 8 times.	In a Blue Chest in Emberglow Laboratory: Inner Chambers (part of Bestower of Fame).
Elemental Break	Staff	Deal Staff damage to a foe and lower Elemental Defense for 2 turn(s).	Entreat from Elderly Cleric in Flamesgrace Cathedral.
Repeated Whirling Bash	Staff	Deal Staff damage to all foes 2 time(s).	Entreat from Old-Timer in Victors Hollow: Old Quarter.
Double Slam	Tome	Deal Tome damage to random foes 2 time(s).	Entreat from Burly Scholar in Theatropolis Library. In a chest behind Elite Enemy in Theatropolis Amphitheatre: Rehearsal Room.
Double Slap	Tome	Deal Tome damage to all foes 2 time(s).	Contend with Olive (Danger Lv. 18) in Wishvale.
Heavy Tome	Tome	Deal great Tome damage to a foe.	Entreat from Knowledgeable Woman in Berecain.
Pontificate	Tome	Deal Tome damage to a foe 2 to 4 time(s).	Purchase from Ludo with Shepherds Rock Trade Goods List.
Quadruple Slam	Tome	Deal Tome damage to random foes 4 time(s).	Defeat Pelagia the Conjurer.
Triple Slam	Tome	Deal Tome damage to random foes 3 time(s).	Entreat from Scholar of the Deep in Grandport: Estate Entrance.
Tumultuous Tome Toss	Tome	Deal Tome damage to all foes.	In a chest in the Donescu graveyard.
Fan Frenzy	Fan	Deal Fan damage to a foe 4 time(s).	Purchase from Theatre Receptionist at Theatropolis Amphitheatre (110,000 or 54,000 Leaves). Entreat from Arena Dancer in Victors Hollow: Arena.
Knock Out	Fan	Deal Fan damage to a foe and gain a chance to inflict sleep for 2 turn(s).	In a Blue Chest in the Valore: Main Boulevard tavern.
Spiral Dance	Fan	Deal great Fan damage to all foes.	Purchase from Former Working Dancer in Sunshade tavern (79,000 or 40,000 Leaves).
Swirling Arc	Fan	Deal Fan damage to all foes.	TBD
Wild Strike	Fan	Deal Fan damage to random foes 2 time(s).	Unlock Mastery in Pius’s skill menu.
Cleansing Fire	Fire	Deal Fire damage to a foe.	Unlock Mastery in Pius’s skill menu.
Fiendish Flame	Fire	Deal great Fire damage to a foe.	In a chest in Hell: South Cragspear Pass.
Fireball	Fire	Deal Fire damage to all foes.	Purchase from Regular Patron of Clearbrook tavern.
Flames of Judgement	Fire	Deal Fire damage to random foes 2 time(s).	Unlock Mastery in Pius’s skill menu.
Hellish Flame	Fire	Deal Fire damage to all Foes.	In a chest in Castle Edoras.
Spark of Fire	Fire	Deal Fire damage to all foes.	Purchase from Russell in Atlasdam Palace Gate (7,200 or 3,600 Leaves). Purchase from Ludo with Wishvale Trade Goods List.
Wildfire	Fire	Deal Fire damage to a foe.	Entreat from Elderly Woman from a Distant Land in Rippletide. Unlock Mastery in Therion’s skill menu.
Blizzard	Ice	Deal Ice damage to all foes 2 time(s).	Entreat from Religious Scholar in Flamesgrace Cathedral.
Hailstorm	Ice	Deal Ice damage to random foes 2 time(s).	Entreat from Devout Nun at Emberglow chapel. Contend with Distraught Fisherman (Danger Lv. 24) in Donescu.
Icewind	Ice	Deal Ice damage to all foes.	Contend with Traveling Writer (Danger Lv. 18) in Rippletide tavern.
Ice Blast	Ice	Deal great Ice damage to a foe.	Purchase from Ludo with Clearbrook Trade Goods List. Contend with Head of the Artisan’s Guild (Danger Lv. 37) outside of Cathedral of Tytos (during Bestower of Fame).
Ice Fog	Ice	Deal Ice damage to random foes 3 time(s).	In a chest behind Elite Enemy in Valley of the Flame.
Icicle	Ice	Deal Ice damage to a foe.	Entreat from Elderly Woman from a Distant Land in Rippletide.
Mass Ice Blast	Ice Blast	Deal great Ice damage to all foes.	Entreat from Frostbitten Drunk in Hell: Valore – Main Boulevard.
Nocturne of Icy Slumber	Ice	Deal Ice damage to a foe 2 time(s) and gain a chance to inflict Sleep for 2 turn(s). Song skill.	TBD
Lightning’s Call	Lightning	Deal Lightning damage to a foe.	Contend with Acerbic Scholar (Danger Lv. 9) in Theatropolis library.
Song of Booming Thunder	Lightning	Deal Lightning damage to a foe 2 time(s) and gain a chance to inflict paralysis for 2 turn(s).	In a Blue Chest in Cragspear Pass.
Song of Roaring Thunder	Lightning	Deal Lightning damage to random foes 4 time(s). Song skill.	Purchase from Goodwin in Wishvale for 52,500 or 26,250 Leaves (requires Amity Lv. 3).
Swiftbolt	Lightning	Deal Lightning damage to random foes 3 time(s). More potent if acting first that turn.	In a chest behind an Elite Enemy in Road to Castle Edoras.
Thunderbird	Lightning	Deal Lightning damage to a foe.	Entreat from Elderly Woman from a Distant Land in Rippletide.
Thunderquake	Lightning	Deal great Lightning damage to a foe.	Purchase from Ludo with Grandport Trading Goods list.
Tonitrus Canere	Lightning	Deal Lightning damage to all foes 3 time(s).	Entreat from Cyrus in Wishvale (requires Amity Lv. 3).
Sweeping Gale	Wind	Deal Wind damage to a foe 2 time(s).	Entreat from Elderly Woman from a Distant Land in Rippletide.
Song of Winds	Wind	Deal wind damage to a foe. Song skill.	Unlock Mastery in Saoirse’s skill menu.
Tradewinds	Wind	Deal wind damage to a foe.	Unlock Mastery in Tressa’s skill menu.
Trade Tempest	Wind	Deal Wind damage to all foes.	Unlock Mastery in Tressa’s skill menu.
Tune of the Tempest	Wind	Deal Wind damage to random foes 3 time(s). Song skill	TBD
Windblast	Wind	Deal Wind damage to all foes. More potent if attacking from the back row.	In a Blue Chest behind Elite Enemy in Great Tree’s Tears.
Wind’s Breath	Wind	Deal great Wind damager to a foe.	Defeat the Tyrannodrake in the Wishvale Monster Arena.
Wind Slash	Wind	Deal Wind damage to a foe 3 time(s).	Contend with Diligent Guard (Danger Lv. 39) in Atlasdam Palace.
Luminescence	Light	Deal Light damage to all foes.	Entreat from Priest Preaching Love in Cragspear chapel.
Lux Congerere	Light	Deal Light damage to all foes 3 time(s).	Contend with Scholar of Harmony (Danger Lv. 45) in Berecain.
Virtuous Light	Light	Deal Light damage to a foe 2 time(s).	In a chest in Flamesgrace Cathedral. Purchase from Senior Nun in Cathedral of Tytos (during Bestower of Fame).
Curse of Shadow	Dark	Deal Dark damage to random foes 3 time(s).	Entreat from Alexia in Wishvale (requires Amity Lv. 3).
Dark Strike	Dark	Deal Dark damage to a foe 2 time(s).	In a chest in Stillwater Subterrane.
Shadow Bind	Dark	Deal Dark damage to a foe and lower speed for 2 turn(s).	Purchase from Indomitable Dancer in Valore: Main Boulevard (5,600 or 2,900 Leaves).
Shadow of Remorse	Dark	Deal Dark damage to random foes 4 time(s).	Defeat Judah the Believer.
Song of Nightfall	Dark	Deal Dark damage to random foes 2 time(s). Song skill.	Defeat Francesca the Actress.
Veil of Darkness	Dark	Deal Dark damage to all foes and dodge 1 physical attack with a 100% success rate.	Purchase from Ludo with Berecain Trade Goods list.
Abating Orb	–	Remove 1 attribute-raising effect from a foe.	In a Blue Chest in the Sufrataljah: Palace.
Arcane Explosion	–	Deal non-elemental damage to all foes.	Defeat Gonska the Jester.
Arcane Healing	–	Restore HP of the entire front row or back row, and remove an attribute-reducing effect.	In a chest behind Elite Enemy in Herminia’s Former Manse.
Arcane Shot	–	Deal non-elemental damage to a foe.	In a chest in Cathedral of Tytos’s confessional room (part of Bestower of Fame).
Bodyguard	–	Take damage from single-target attacks meant for a near-death ally for 1 turn(s).	Purchase from Garrulous Bodyguard in Valore tavern. Purchase from Ludo with Rippletide Trade Goods List.
Collect	–	Collect Leaves from a foe.	Unlock Mastery in Tressa’s skill menu.
Counter Position	–	Select a weapon and counter physical attacks for 3 turn(s).	Defeat General Krauser in Cragspear.
Dance of Immunity	–	Grant an ally the ability to nullify attribute-reducing effects for 2 turn(s). Dance skill.	Defeat Tatloch the Lady of Grace.
Dance of Repose	–	Grant HP Regeneration to an ally for 3 turn(s). Dance skill.	Unlock Mastery in Saoirse’s skill menu.
Dance of Respite	–	Grant HP regeneration to the entire front row or entire back row for 2 turn(s). Dance skill.	Unlock Mastery in Saoirse’s skill menu.
Donate Charge	–	Grant 50% of caster’s remaining Ultimate Technique gauge to an ally.	Entreat from Versatile Painter outside of Sulfrataljah Palace.
Eerie Smile	–	Lower Physical Defense and Elemental Defense of all foes for 2 turn(s).	Purchase from Senior Gardener outside of Sulfrataljah Palace (150,000 or 72,000 Leaves). In a chest in Hell: Geist Canyon.
Element Break	–	Deal great non-elemental damage to a foe and lower Elemental Attack and Elemental Defense for 2 turn(s).	Purchase from Ludo with Donescu Trade Goods list.
Element Thief	–	Deal non-elemental damage to a foe 2 time(s) and steal SP equal to 5% of damage dealt.	Entreat from King Osred II of Wold in Atlasdam castle.
Evasive Stance	–	Raise own Evasion for 3 turn(s).	Unlock Mastery in Bargello’s skill menu.
Eye Gouge	–	Deal non-Elemental Physical damage to all foes and gain a chance to inflict blindness for 2 turn(s).	Purchase from Shifty Moneylender in Atlasdam (40,000 or 25,000 Leaves).
Guardian Aura	–	Raise Elemental Defense of the entire front row or back row for 2 turns.	In a chest in Hell: Cragspear Pass.
Heal Wounds	–	Restore HP of the entire front or back row of allies.	Unlock Mastery in Pius’s skill menu.
Inhibit Offense	–	Lower Physical Attack/Elemental Attack of a foe for 2 turn(s).	Defeat Heidne outside of Flamesgrace.
Lower Defenses	–	Lower Physical Defense and Elemental Defense of a foe for 2 turn(s).	Unlock Mastery in Bargello’s skill menu.
Maiming Bite	–	Deal non-elemental physical damage to a foe and lower Physical Attack for 2 turn(s).	Defeat boss in Kindlers of the Flame Ch. 5.
Mole Dance	–	Raise Physical Defense of an ally for 2 turn(s). Dance skill.	Unlock Mastery in Saoirse’s skill menu.
Oppression	–	Lower Physical Attack/Physical Defense of all foes for 2 turn(s).	Contend with Fierce-Looking Guard (Danger Lv. 53) in Grandport. Purchase from Ludo with Cragspear Trade Goods list.
Panther Dance	–	Raise Speed of an ally for 2 turn(s). Dance skill.	Unlock Mastery in Saoirse’s skill menu.
Poison Breath	–	Deal non-elemental physical damage to all foes and gain a chance to inflict poison for 2 turn(s).	Collection Point from Boy Standing in Corner in Sufrataljah. In a chest in the Middlesea.
Rage	–	Deal non-elemental physical damage to all foes.	Contend with Rosso (Danger Lv. 46) after Bestower of Wealth Ch. 3 in Valore.
Rampage	–	Deal non-elemental physical damage to random foes 1 to 3 time(s).	Purchase from Ludo with Wishvale Trade Goods List.
Recuperate	–	Restore own HP and raise own Physical Defense for 3 turn(s).	Contend with Assiduous Mercenary (Danger Lv. 40) in Sunshade.
Rehabilitate	–	Grant an ally immunity to status ailments for 2 turn(s).	Defeat Jurgen.
Repeated Bash	–	Deal damage to a foe with all weapons 2 time(s).	In a chest behind an Elite Enemy in the Valley of Death. Contend with Octopus Traveler (Danger Lv. 55) in Desert Island in the Outersea. In a chest in Isle of Sages.
Rest	–	Restore own HP/SP and cure own status ailments.	Unlock Mastery in Macy’s/Tressa’s skill menu.
Ruinous Kick	–	Deal great non-elemental physical damage to a foe. Lower Shield Points regardless of target’s weak points.	Purchase from Ludo with Theatropolis Trade Goods list.
Run Rampant	–	Select a weapon and deal damage to random foes 5 to 8 times.	Purchase from Ludo with Clearbrook Trade Goods list.
Savage Claw	–	Deal non-elemental physical damage to all foes and lower physical attack for 2 turn(s).	Defeat Mighty Managarmr (Alpaca Roundup side quest).
Shackle Foe	–	Lower Physical Attack of a foe for 2 turn(s).	Unlock Mastery in Therion’s skill menu.
Share SP	–	Grant 50% of remaining SP to an ally.	In a chest in the Theatropolis Amphitheatre Backstage. Unlock Mastery in Macy’s skill menu.
Sidestep	–	Grant self the ability to dodge physical attacks 1 time(s).	Unlock Mastery in Celsus’s/Tressa’s skill menu.
Smite of Fury	–	Select a weapon and deal great damage to all foes.	Defeat Gonzales the Ironarm.
Song of Darkness	–	Gain a chance to inflict blindness on a foe for 3 turn(s). Song skill.	Entreat from Lovelorn Dancer in Grandport.
Song of Slumber	–	Gain a chance to inflict sleep on a foe for 2 turn(s). Song skill.	Unlock Mastery in Saoirse’s skill menu.
Soporific Fang	–	Deal non-elemental physical damage to a foe and gain a chance to inflict sleep for 2 turn(s).	Capture Tyrannodrake in the Gray Grotto: Depths for the Wishvale Monster Arena.
Stalwart Aura	–	Raise Physical Defense of the entire front row or entire back row for 2 turn(s).	TBD
Stalwart Veil	–	Raise Physical Defense of an ally for 2 turn(s).	Unlock Mastery in Pius’s skill menu.
Steal	–	Steal an item from a foe.	Entreat from Brigand Boss in Cragspear. Unlock Mastery in Therion’s skill menu.
Stunning Strike	–	Select a weapon and deal great damage to all foes.	Contend with Legendary Swordsman (Danger Lv. 50) in Victors Hollow: Arena Gate.
Sweep	–	Select a weapon and deal damage to all foes.	Unlock Mastery in Pius’s skill menu.
Toxic Dust	–	Deal non-elemental physical damage to a foe and again a chance to inflict poison for 2 turn(s).	Purchase from Ludo with Valore Trade Goods List.
Triple Strike	–	Select a weapon and deal damage to random foes 3 time(s).	Defeat Cerro the Emissary.
Twin Shot	–	Select a weapon and deal damage to a foe 2 time(s).	TBD
Ultimate Stance	–	Extend the reach of your “Attack” to all foes for 3 turn(s).	Contend with Estadas (Danger Lv. 50) in Victors Hollow: Arena Gate.
Virulent Fog	–	Inflict poison, paralysis, sleep, or blindness on a foe for 3 turn(s)	In a Blue Chest in Rippletide Pub.
Vivify	–	Revive an ally.	Purchase from Elderly Apothecary in Donescu for 63,000/32,000 Leaves.

All Support Masteries

Unlike Battle Masteries, Support Masteries are passive effects, such as ones that grant you a chance to counter attacks or restore HP at the end of a battle. While you can have three Battle Masteries equipped, you get only two Support Masteries at a time.

Name	Effect	Location
Angelic Ward	Gain a 25% chance to nullify damage when the equipped character takes damage.	Entreat from Patient Cleric in Flamesgrace Cathedral.
Amplifying Break	Raise the equipped character’s elemental attack when breaking a foe.	Defeat Man-Eating Flora in the Wishvale Monster Arena.
Augmented Boost	Raise damage dealt during Boost when the equipped character attacks.	Purchase from Ludo with Cragspear Trade Goods List.
Back Row Support	When the equipped character is in the back row, grant HP restoration to paired ally.	Unlock Mastery in Pius’s skill menu.
Bolstering Break	Raise equipped character’s Physical Attack when breaking a foe.	In a chest behind Elite Enemy in Emberglow Laboratory. Capture the Auonvarg in Atlasdam Flats for the Wishvale Monster Arena.
Boosting Break	Restore the character’s BP by 1 when breaking a foe.	In a chest behind Elite Enemy in Emberglow Laboratory: Inner Chambers (part of Bestower of Fame). Entreat from Celsus in Wishvale (requires Amity Lv. 3).
BP Regeneration	The equipped character gains a 25% chance to restore BP used.	Purchase from Levina for 63,000 or 32,000 Leaves (after Bestower of Wealth Ch. 3).
Celebration of the Arts	Extend the duration of song and dance effects by 1 turn.	In a Blue Chest in Golden Palace (during Bestower of Wealth Ch. 3).
Defiant Spirit	When the equipped character has an attribute-reducing effect, raise BP recovery by 1 at the start of the turn.	Entreat from Mystery-Chasing Explorer in Sufrataljah. Defeat Fallen Mahrez. Purchase from Bargello in Wishvale (requires Amity Lv. 3).
Detect Danger	At the start of turn, grant self a 35% chance to dodge physical attacks 1 time(s).	Entreat from Castle Gate Guard at Cragspear: Castle Edoras Gate.
Elemental Edge	Enhance the equipped character’s Elemental Attack and Elemental Defense during battle.	Entreat from Isla in Wishvale (requires Amity Lv. 3).
Elemental Expertise	Raise damage dealt by the equipped character’s elemental attacks.	Contend with Long-Standing Divine Soldier (Danger Lv. 43) in the Royal Academy of Atlasdam. Defeat King Pardis III.
Evasive Maneuvers	Reduce the rate of random encounters by 50%. (This effect is not cumulative.)	In a chest behind Elite Enemy in Cavern of Mists
Evil Ward	Raise the party’s success rate when attempting to flee. (This effect is not cumulative.)	Entreat from G’roha Soldier with No Fight Left in Sunken Ship.
Extra Experience	Receive additional EXP at the end of battle. (This effect is not cumulative.)	Entreat from Retired Military Leader at Cragspear.
Eye for an Eye	Gain a 50% chance to counter physical attacks.	TBD
Fierce Rush	Raise the potency of multi-hit attacks against broken foes.	Unlock Mastery in Reime’s skill menu.
Foresight	The equipped character will have a 25% chance to restore 1 BP when attacked.	Unlock Mastery in Viator’s skill menu.
Formidable Stance	At the start of the turn, raise the equipped character’s physical attack up to 5 tiers when in the front row. Effect is canceled when in the back row at the start of turn.	In a Blue Chest in Subterranean Arena (Victors Hollow). Steal from Fallen Elrica.
Fortitude	Raise the equipped character’s attack skill potency the lower their HP.	In a chest in Cragspear Slums.
Healing Item Expertise	Increase the effects of healing items during battle.	Unlock Mastery in Macy’s skill menu.
Immeasurable Power	Consume twice the SP with physical skills but raise the potency.	Purchase from Ludo with Shepherds Rock Trade Goods list.
Incidental Attack	The equipped character gins a 50% chance of also attacking when using a non-damaging skill.	Unlock Mastery in Therion’s skill menu.
Incidental Heal	After the equipped character acts, gain a 50% chance to restore the HP of an ally in the front row with the least HP.	Unlock Mastery in Stia’s skill menu.
Invigorate and Inspire	Slightly fill the target’s Ultimate Technique gauge when the equipped character uses a skill to grant an attribute-raising effect.	TBD
Invigorating Attack	Restore HP equal to 10% of damage deal when using “Attack.”	Unlock Mastery in Macy’s skill menu.
Leadership	Increase tiers of command augmenting effects by 1 and extend their duration by 1 turn.	Purchase from Ludo with Atlasdam Trade Goods list.
Monster Magnet	Increase the rate of random encounters. (This effect is not cumulative.)	Contend from Punching Bag in Cragspear Slums. In a Blue Chest in Serpent’s Burrow.
More Rare Monsters	Increase chance of encountering rare monsters. (This effect is not cumulative.)	In a Blue Chest in the Snowshard Grotto.
Physical Prowess	Enhance the equipped character’s Physical Attack/Physical Defense during battle.	Contend with Reime (Danger Lv. 60) in Wishvale (requires Amity Lv. 3).
Preventative Measures	At the start of battle, grant self the ability to nullify 3 attribute-reducing effects.	In a chest on Shepherds Rock Pass. Entreat from Medicinal Herb Student at the Royal Academy of Atlasdam.
Rear Second Wind	Grant the equipped character SP regeneration when in the back row.	Entreat from Selfless Priest in Cathedral of Tytos (during Bestower of Fame Ch. 1).
Resilient Stance	At the start of turn, raise the equipped character’s Elemental Defense up to 5 tiers when in the front row. Effect is cancelled when in the back row at the start of turn.	In a chest in the Cathedral of Tytos (Embervale). In a chest behind Elite Enemy at Cyphlo Banks.
Ruthless Assault	Raise the equipped character’s skill potency when attacking a foe inflicted with status ailments.	Defeat Vaughner the Man-Eating Miser. In a chest in Cave of Origins.
Salt the Wound	The equipped character gains a 50% chance of acting twice when breaking a foe. This will not trigger in succession.	Collection Point in Middlesea during Bestower of Power Ch. 3.
Snatch	The equipped character will seize twice the amount when using Steal or Collect.	Unlock Mastery in Therion’s skill menu.
SP Recovery	Restore SP equal to 1% of damage taken by the equipped character.	Purchase from Ludo with Theatropolis Trade Goods List. Entreat from Berecain Village Chief.
SP Saver	Halve SP required for the equipped character’s skills.	Unlock Mastery in Tressa’s skill menu.
Stat Swap	Swap the equipped character’s Physical Attack and Elemental Attack.	In a chest behind Elite Enemy in Waterpool Caves.
Stronger Strikes	Raise the equipped character’s skill potency when exploiting a foe’s weak point.	In a chest in Finesand Ruins. Purchase from Ludo with Emberglow Trade Goods List. Defeat Fallen Sonia.
Supporting Strike	When the equipped character is in the back row, gain a 50% chance to perform a follow-up attack when paired ally attacks.	Contend with Resolute Noblewoman in Donescu.
Ultimate Charge	At the start of battle, charge the equipped character’s Ultimate Technique gauge by 1.	Defeat Auonvarg in the Wishvale Monster Arena.
Ultimate Support	Increase the amount the equipped character’s Ultimate Technique gauge fills.	Entreat from Aspiring Gladiator in Victors Hollow chapel.
Vigorous Victor	Restore 30% of the equipped character’s maximum HP and SP upon winning the battle.	Unlock Mastery in Phenn’s skill menu.
Vim and Vigor	Restore HP of equipped character every turn.	Unlock Mastery in Celsus’s skill menu.

How to equip and use Masteries

Equipping Masteries is as simple as learning your character’s innate abilities. To equip a Mastery in Octopath Traveler 0, open the menu, then scroll down to the “Skills” option. Choose the first option that pops up, “Equip Skills.” This will then open a screen that shows your companions‘ equipped Masteries, separated by Action Skills, or Battle Masteries, and Support Skills.

You won’t start with all of the slots unlocked. Each of your companions starts out with one Battle Mastery slot. You’ll need to spend JP, which can be earned through successful combat encounters or at the Training Ground in Wishvale, to unlock either another Battle Mastery slot or a Support Mastery slot. Characters can have up to three Battle Masteries and two Support Masteries.

I recommend choosing Masteries that fill damage types your active team is missing. I lacked Light damage in my lineup, for example, so I chose to put Luminescence on Alexia, my strongest Special Attacker. This covered all my elemental bases with both her and Pius on my team, and I was able to have a companion who could deal damage to every weak point I might come across in my travels around Orsterra.

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