Asmodeus, Lord of Lies

Whenever Asmodeus is put into the graveyard or
exile from anywhere, put it into your library sixth
from the top.
At the beginning of each turn, that player may
put a +1/+1 counter on any number of creatures
they control.
Whenever a creature with a +1/+1 counter on it
dies, create a 1/1 red devil token with Devildeath.