Razleth, Unceasing Scourge

Flying
{b}{b}: Regenerate Razleth, Unceasing Scourge.
Undying (When this creature dies, if it had no
+1/+1 counters on it, return it to the battlefield
with a +1/+1 counter on it.
When Razleth, Unceasing Scourge enters the battlefield, target opponent sacrifices a
permanent.