Brain Eater
From Archon Arcana - The KeyForge Wiki
Brain Eater • Logos • Creature • Uncommon • After an enemy creature is destroyed fighting Brain Eater, draw a card. • Artist: Gong Studios • Card Number: CotA:137, AoA:126, DT:036
Commentary
Regardless if Brain Eater was the attacker in a fight, if Brain Eater survives a fight, its ability will resolve.
Source: Timing Chart•Fight