Corix, Consumer of Light

Trample, Devour 2, Protection from white
instants and enchantments
Corix, Consumer of Light enters the battlefield
tapped with six additional +1/+1 counters on it.
Whenever another hydra, goblin or creature with devour enters the battlefield you may lose three
life, tap an untapped creature you control, draw a
card and put a +1/+1 counter on a hydra.
{b/g}{u/r}{t}: Regenerate a hydra.