Vile Hydra

Mutate: 4 life, {p/b}{p/b}{p/g}{p/g}
Deathtouch, Mutate, Trample
When this creature mutates or survives combat damage give it Indestructible and +2/+2. If this creature would enter the graveyard or exile instead give it -1/-1 and return it to the battlefield tapped.