Increases DMG of the second heavy punch of Nocturn Hooks (Main Skill) by 30%, as well as its Attack Range. When casting the Main Skill, increases all friendly units' Crit Rate by 10% for 8s.

When any other friendly unit lands a Crit Hit, reduces the Cooldown of Nocturn Hooks (Main Skill) by 1s, and leaves claw marks at the target's location, dealing 21.4% of Cosette's ATK as AoE Umbra Skill DMG and inflicting Umbra Mark: Gloom. This effect can only be triggered 5 times per Skill cast.

After casting Nocturn Hooks (Main Skill), Cosette's Auto Attack is enhanced for 8s, increasing its Attack Range, Auto Attack Damage by 60%, and ATK SPD by 35%. Her Auto Attack can also inflict Umbra Mark: Gloom.

When Cosette inflicts Umbra Mark: Gloom on the same target for the 3rd time, leaves claw marks, dealing 39.3% of ATK as AoE Umbra Skill DMG, increasing the target's Umbra DMG Taken by 32% for 3s, and inflicting Umbra Mark: Gloom. This effect can only be triggered once per second.

Increases the Attack Range of Abyssal Hunter (Support Skill). Increases the Umbra DMG Taken of targets caught within the claw marks' range by 12%.

Abyssal Hunter (Support Skill) can pull in targets. Increases the Umbra DMG Taken of targets caught within the claw marks' range by 26.7%.

Abyssal Hunter (Support Skill) will launch 4 additional claw strikes. For every 4 claw strikes, increases all friendly units' ATK by 4.6% for 5s, stacking up to 3 times.

Abyssal Hunter (Support Skill) will also launch a finishing heavy strike, dealing 48.2% of ATK as Umbra Skill DMG. For every 4 claw strikes, increases all friendly units' ATK by 3.8% for 5s, stacking up to 4 times.

When Nocturn Hooks (Main Skill) deals DMG, increases the targets' Umbra DMG Taken by 52% for 5s, up to 3 stacks.

When Nocturn Hooks (Main Skill) kills a target, increases all friendly units' ATK by 46% for 8s.

When casting Nocturn Hooks (Main Skill), increases all friendly units' ATK by 35% for 8s.

When Cosette uses Auto Attacks, increases all friendly units' ATK by 14% for 2s, stacking up to 5 times.

For each target near Cosette inflicted with Umbra Mark: Gloom, increases her DEF by 92, stacking up to 3 times.

Cosette can dodge one more time. When dodging, increases the ATK of a random support Trekker by 25% for 6s.

When a squadmate triggers Umbra Mark, increases their ATK by 9% for 3s, stacking up to 5 times.

After Cosette deals 5 instances of Auto Attack DMG, she gains a shield equal to 27% of her Base Max HP for 5s. This effect can only be triggered once every 6s.

Cosette can dodge through barriers. When dodging, increases her ATK SPD by 29% for 3s.

When Abyssal Hunter (Support Skill) deals DMG, increases the target's Umbra DMG Taken by 45% for 5s.

Abyssal Hunter (Support Skill) now attacks random nearby targets. When Cosette inflicts Umbra Mark: Gloom to a target without a Mark, increases all friendly units' ATK by 69% for 5s.

Each claw strike from Abyssal Hunter (Support Skill) increases the main Trekker's DEF by 40 for 5s, up to 8 stacks.

When Abyssal Hunter (Support Skill) deals DMG, there is a 30% chance to stun the target for 3s. Also increases all friendly units' ATK by 51% for 5s. This effect can only be triggered once every 0.5s.

When Cosette repeatedly inflicts Umbra Mark: Gloom on the same target, increases Umbra squadmates' ATK by 87% for 5s.

When Cosette is on the battlefield, increases the main Trekker's ATK by 83%.

While Cosette is casting the Support Skill, increases the main Trekker's DEF by 307.

When Abyssal Hunter (Support Skill) deals DMG, there is a 30% chance to reduce the target's Resilience by 0.9%. This effect can only be triggered once every 0.5s.

Increases Umbra Trekkers' ATK by 54%.

Increases Dark Apocalypse (Ultimate)'s Ultimate DMG to targets at the center by 193%.

When Dark Apocalypse (Ultimate) deals damage, increases the target's Umbra DMG Taken by 147% for 10s.

When Dark Apocalypse (Ultimate) deals DMG, reduces the targets' ATK by -22% for 15s.