Hissing Hydra

Hissing Hydra enters the battlefield with three Head Counters on it.
Whenever you regenerate Hissing Hydra, put a Head counter on Hissing hydra for each Head counter on it.
Hissing Hydra gets +1/+0 for each Head counter on it. As long as it has four head counters on it, it has deathtouch. As long as it has twelve or more, it gets +0/+12 and has trample.
{g}{g}: Regenerate Hissing Hydra.