Enma, Bushi of Takenuma

Enma, Bushi of Takenuma enters the battlefield
tapped, can't be sacrificed, and if it would be
destroyed, regenerate it.
Whenever Enma regenerates, destroy target
creature. This ability can only trigger only twice
each turn.
Whenever a creature dies, put a number of
+1/+1 counters on Enma equal to the power of
that creature.