Rona, Plague Incarnate

Mutate {2}{b/g}{b/g} (If you cast this spell 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.)
Deathtouch
Whenever this creature mutates, destroy target
nonland permanent and all other permanents
with the same name as that permanent.