Exclusive · Batman Death Metal only
Reaper's Summons
- UnlockAt the start of battle, Batman Death Metal summons two Blackest Bats to join the fight. Each Blackest Bat inherits 25% Attack and 50% HP from Batman Death Metal and lasts 15s. Whenever an allied Champion is defeated, Batman Death Metal gains 25 Energy.
- 5★ WhiteAt the start of battle, Batman Death Metal summons two Blackest Bats to join the fight. Each Blackest Bat inherits 45% Attack and 75% HP from Batman Death Metal and lasts 15s. Whenever an allied Champion is defeated, Batman Death Metal gains 25 Energy.
- 5★ PurpleAt the start of battle, Batman Death Metal summons two Blackest Bats to join the fight. Each Blackest Bat inherits 70% Attack and 100% HP from Batman Death Metal and lasts 15s. Whenever an allied Champion is defeated, Batman Death Metal gains 25 Energy.
- 5★ RedAt the start of battle, Batman Death Metal summons two Blackest Bats to join the fight. Each Blackest Bat inherits 100% Attack and 125% HP from Batman Death Metal and lasts 15s. Whenever an allied Champion is defeated, Batman Death Metal gains 25 Energy.

Firepower
Magical
Assassin
