Ob Nixilis, Cruel Despot

+1: Target player discards a card. If that player discarded a creature card this way, they may draw a card and lose 2 life.
-X: Destroy each other creature or planeswalker with converted mana cost X. You lose life equal to the number of permanents destroyed this way.
: Whenever a creature dies, put a loyalty counter on Ob Nixilis, Cruel Despot.