Behemoth, the First

Indestructible, obliterator 2 (When this creature attacks, defending player sacrifices 2 nonland permanents)
{3}{r}: Destroy target creature. Active only
any time you could cast a sorcery,
and only once per turn.
Endbringer Physiology—If Behemoth is ever dealt
exactly six damage by one source at one time, sacrifice him.