Shadow Emperor Koshi

Attacks a single enemy, dealing 100% physical damage. After attacking, applies 1 stack of Shadow Emperor's Blade to allied units in the same row. Shadow Emperor's Blade (Enhancement, non-dispellable, non-transferable): the holder gains Crit Rate +3% and Crit DMG +5%, stacking up to 5.

Applies Shadow Mark to all enemies for 2 rounds, then attacks all enemies dealing 104% physical damage; this attack always crits. After casting, allied units in the same row gain Black Sun Shadow for 2 rounds. Shadow Mark (non-dispellable, non-transferable): when the holder is hit, it additionally records 80% of the attacker's attack as damage. Recorded damage can crit and is doubled when a crit triggers. Before the holder acts, all recorded values detonate as settlement damage. Black Sun Shadow (Enhancement, non-dispellable, non-transferable): the holder gains Crit Rate +30% and, when dealing damage that triggers a crit, +30% calculated damage.

When deployed as an assist, grants all allies Crit Rate +20% for 2 rounds.

2★: Blazing Life: Damage dealt +15%. 3★: Bloodshadow Imperial Vein: At the start of each round, gain 1 stack of King's Blood; when a skill you cast triggers a crit, gain 1 more (up to 3 per round). Upon reaching 5 stacks, enter Shadow Emperor's Advent for 2 rounds. King's Blood (Enhancement, non-dispellable, non-transferable): each stack grants all allies Damage +5% and Crit DMG +5%, stacking up to 10. Shadow Emperor's Advent (non-dispellable, non-transferable): on gaining it, immediately add 1 Kotodama skill cast. While active, each King's Blood stack additionally raises all allies' Crit DMG cap by +5%. When it ends, remove 5 stacks of King's Blood. 4★: Final Sentence: ATK +30%. 5★: Black Sun Inferno: each time recorded damage triggers a crit, final detonation damage +2%, up to +50%. Black Sun Shadow reduces its holder's calculated damage taken by 70%; each round that passes in battle reduces this by 10%, eventually flipping to +10% calculated damage dealt.

1★: Shadow Emperor's Blade max stacks raised to 10; after each Kotodama cast, gain 3 stacks of Shadow Emperor's Blade. During Shadow Emperor's Advent, the attribute bonus from each King's Blood stack is doubled. 3★: At the end of each round, a fixed 50% chance to apply Shadow Mark to all enemies for 2 rounds. If Shadow Mark is gained again while already active, it detonates the recorded settlement damage once without consuming it. 5★: When an allied unit's damage triggers a crit, additionally record 40% of that damage into the target's Shadow Mark. For every 3 rounds that pass in battle, the per-round King's Blood gain cap is increased by +1.