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11 Corvus is the Nushi of the Drowned Region, a huge bird that spends most of the fight in the air and coats the arena in acid. Both encounters happen in Chapter 7 at the Giant Tree Zone, at level 38 and then level 41, and it is weak to Lightning throughout. Clearing it unlocks the Corvus's End achievement.
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33 Encounter Summary
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55 DetailValueChapterChapter 7RegionDrowned RegionLocationGiant Tree ZoneLevels38 (first fight), 41 (second fight)WeaknessLightningNotableThe second fight adds a phase change and a diving finisherAchievementCorvus's End
66 Reaching Each Fight
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88 Chapter 7 gates both arenas behind cable cars. The control panel for the Giant Tree gate is dead on arrival, and the ancient golem beside it points at a tower with smoke rising off it; clearing the tower produces the gate key and the Fall Thunder sword in one go. Past the opened gate, the rusted golem next to the campsite hands over the Line Zero card key, and the Line Zero cable car climbs to the first arena. Beating Corvus there yields the Line One card key, and nothing but that key activates the Line One cable car that reaches the second arena. Both routes start from the same camp, so a failed attempt costs one cable-car ride rather than the whole zone.
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1010 Rewards
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1212 FightLevelRewardsFirst38Nushi Skill: Acid Burst Nobudou, Bloom Art: Nobudou: Burst, Blade Art: Nobudou, Card Key (Line One)Second41Corvine Memories, Bloom Art: Nobudou: Burst II, Finisher: Nobudou
1313 Finisher: Nobudou is gated on the second kill specifically, so it belongs on the level 41 line even though some reward lists stop at the Bloom Art. A Light Box appears on the first fight's drop list in one place and nowhere else, which is why it is left off the table above. After the rematch, a report found on a dead golem triggers the conversation that closes the chapter.
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1515 Attack Patterns
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1717 AttackHow It WorksResponseAcid Bomb DropsFlies across the arena trailing acid bombs that linger on the ground.Keep moving and never stand in the residue.Acid DiveDives into the ground and leaves a wide acid pool on impact.Unparryable. Sprint or dodge out of the marked area.Three-Shot AcidWinds up briefly, then fires three acid projectiles.Unparryable. Dodge each shot.Three Talon ComboSlashes three times in quick succession with its talons.Parry all three. This is the best stagger window in the fight.Lunging PeckPulls its head back and lunges with a heavy peck.Parry to stagger, or dodge to either side.Sky DropSecond fight only. Climbs high, glows red, then dives at speed.Unparryable. Leave the impact zone or perfect dodge, then punish.
18+Post-Launch Changes to the Acid Pools
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20+The acid on the arena floor has been through two patches. On August 24, 2026 a change stopped crow-type enemies generating acid damage fields at all, which quietly removed most of the hazard that defines this fight. On September 8 the developer put it back, but narrowed: acid pool generation was re-enabled for specific Corvus attacks only. The Acid Dive and the bomb trail still coat the ground; the incidental acid that used to come off other crow attacks does not.
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22+Anything written about this encounter between those two dates describes a version of the fight that no longer exists in either direction. The same September patch also adjusted attack patterns and attack frequency for some Nushi, so the timings below are worth treating as a guide to the moveset rather than a stopwatch.
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1824 How to Beat Corvus
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2026 The problem with Corvus is uptime, not damage. It stays airborne for long stretches, so the Zangetsu Bow and Spring Thunder Crossbow do more work here than in any earlier Nushi fight, and Lightning Arrows and Lightning Bolts double as weakness damage and shock buildup. On the ground, the Thunderwave Sword is the natural pick.
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2228 Koo's job is to bring it down. Restrain buildup grounds the boss and opens a punish window, and Sakura: Javelin covers the range gap because it deals Lightning damage and reaches across the arena. Between attempts, use the platforms: high ground keeps Emma out of the acid pools and shortens the distance to the boss when it hovers.
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2430 Aim rather than spraying ammunition, since resupply matters more in the second fight.Acid on the ground applies damage over time, so reposition rather than fighting through it.Save arrows and bolts for the second phase of the rematch and lean on melee and Koo in the first.
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2632 Preparation
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2834 Lightning is the weakness and reach is the problem, so the loadout is built around hitting a target that spends most of the fight refusing to land.
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3036 ToolWhere It Comes FromWhat It DoesFall ThunderTaken from the enemy holding the gate key on the smoking tower, earlier in the same chapter; listed with the other Katanas51 melee attack with the Lightning Edge passive: 8 lightning buildup for five secondsThunderwave SwordCarried over from the Ancient Civilization Zone51 melee attack with Tempest, which calls lightning onto nearby foes with every slash for 6 buildupBolt ShardCrafted from a Chemical Reagent and a Mechanical Part, then slotted into Koo's itemsThrown for 100 Shock buildup, which is the cheapest way to keep the shock gauge climbingSakura: JavelinElectric-element Koo skillSkewers the target, and a pierced target can be jumped to, which is the fastest way to close on a bird that will not come downLightning Arrows and Lightning BoltsCrafted ammunition, covered under Bow and Ranged CombatWeakness damage and shock buildup for the airborne phases, where nothing else reaches
3137 Related Pages
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3339 Corvus follows Taurus in the Nushi order and precedes Ursa. See Bosses for the full encounter list and Bow and Ranged Combat for the ammunition families this fight leans on.
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3541 The Parry System page covers the talon combo and lunging peck timings, Entanglement Gauge explains the meter to spend once the boss is grounded, and Achievements lists Corvus's End with the other Nushi trophies.