Tanot, Devourer of Souls

If damage would be dealt to Tanot,
Devourer of Souls prevent that damage, and
put that many -1/-1 counters on it instead.
Whenever Tanot, Devourer of Souls deals combat damage to a player you may exile a
card in their graveyard, if you do remove all
-1/-1 counters from Tanot.