Defiant Hydra

Defiant Hydra enters the battlefield with X +1/+1 counters on it
Whenever Defiant Hydra would be dealt damage prevent that damage and dismember it for each 1 point of damage prevented this way. (put a -1/-1 counter on defiant hydra and create a 0/1 colorless appendage creature token.)
Defiant Hydra gets +2/+2 for each Appendage you control