Skairon, Herald of Rot

+1: Put a spore counter on up to 2 target creatures. They gain "when this creature dies, put a loyalty counter on Skairon, Herald of Rot."
-3: Create X green and black 1/1 saproling creature tokens with deathtouch, where X is the number of loyalty counters on Skairon, Herald of Rot.
-11: Exile all cards from all graveyards. You gain life equal to the total mana value of cards exiled this way.