Malthael, Reaper of Souls

0: Target player sacrifices a creature. Put X loyalty counters on Malthael where X is that creature's toughness.
0: Malthael is a 9/9 black Angel creature with flying, lifelink, deathtouch, and indestructible that's still a planeswalker.
-X: Deal damage to target player equal to the number of loyalty counters removed this way. That player sacrifices that many permanents.