Sawtusk Demolisher
{4}{G}{G}
Creature -- Beast
6/6
Mutate {3}{G} (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.)
Trample
Whenever ~this~ mutates, destroy target noncreature permanent. Its controller creates a 3/3 green Beast creature token.