C1: Gaze of the Deep

Even when Oz is not present in combat, he can still watch over Fischl through his raven eyes. When Fischl performs a Normal Attack against an opponent, Oz fires a joint attack, dealing DMG equal to 22% of Fischl's ATK.

C2: Devourer of All Sins

When Nightrider is used, it deals an additional 200% ATK as DMG, and its AoE is increased by 50%.

C3: Wings of Nightmare

Increases the Level of Nightrider by 3.

C4: Her Pilgrimage of Bleak

When Midnight Phantasmagoria is used, it deals 222% of ATK as Electro DMG to surrounding opponents.
When the skill duration ends, Fischl regenerates 20% of her HP.

C5: Against the Fleeing Light

Increases the Level of Midnight Phantasmagoria by 3.

C6: Evernight Raven

Extends the duration of Oz's presence on the field by 2s. Additionally, Oz performs joint attacks with your active character when present, dealing 30% of Fischl's ATK as Electro DMG.