The Nemesis

Trample, Haste
Whenever The Nemesis enters the battlefield or
attacks and it has no +1/+1 counters on it,
create 3 1/1 zombie creature tokens.
{r}{b}Sacrifice 1 zombie creature,
put 1 +1/+1 counter on The Nemesis.
If The Nemesis has 3 or more
+1/+1 counters on it, it gains Indestructible.
During your upkeep, remove 1 +1/+1 counter from The Nemesis, if The Nemesis has no +1/+1 counters on it; it loses Indestructible.