Name: Inevitable Plague
Type: Blue Boss
Condition: An opponent has no spells left in their spellbook.
Ability: During your main phase, pay 2 vim: All summons and all other bosses take 1 damage. When a summon or boss is defeated by this, either by battle or ability: This gains strength equal to the defeated's base strength.
Artist: Rick Bastos
How to use
This boss' first ability is not once per turn, as there is no restriction saying that it can only be used once per turn.
If this ties in a battle, and both it and the opponent it is battling are defeated at the same time, this boss' second ability will occur, but it will still be defeated.