Multihead Imitator

Deathtouch
When Multihead Imitator enters the battlefield, it becomes a Hydra in addition to its other types until end of turn.
Tribal advantage {2}{b}{g} (You may cast this card for its tribal advantage cost. If you do, when this creature enters the battlefield, put a +1/+1 counter on each creature you control that shares a creature type with it.)