Mortarion, Lord of Decay

Flying, Double Strike
At the beginning of your end step, you may pay X life and create X Plague Marine creature token. X
can't be greater than the number of creatures in target players graveyard.

Whenever a Nurgle creature you control deals combat damage to target player, you may return a creature card from your graveyard to the battlefield with mana value less than the number of cards in your hand.