Dirge Bat
{2}{B}{B}
Creature -- Bat
3/3
Mutate {4}{B}{B} (If you cast ~this~ for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flash
Flying
Whenever ~this~ mutates, destroy target creature or planeswalker an opponent controls.