Hiss, the Progenitor

Flash, reach, trample, islandwalk
Devour Brood 1 (As this enters the battlefield, you
may sacrifice any number of Snake, Wurm or
Serpent creatures. This creature enters the battlefield
with that many +1/+1 counters on it.)
{5}, {ut}: Return a Snake, Wurm and Serpent
creature card from your graveyard to the battlefield. Then destroy target Naga
creature.