Behemoth's Summons

Behemoth's Summons enters the battlefield with {x}
behemoth counters on it.
{3}, remove a behemoth counter from
Behemoth's Summons: search your library for a
kraken or hydra creature card and put it onto the battlefield.
{p/u}{p/b}{p/g}: put a behemoth counter on a permanent.
When you remove the last behemoth counter
from Behemoth's Summons, sacrifice it.