Grandfather Nurgle

Decay (whenever this creature deals damage to a player, that player sends the the top card of their library to their graveyard)., Trample, Indestructible, Reach.
This creature deals damage other creatures in the form of -1/-1 counters.
Grandfather Nurgle's power and toughness is equal to the number of cards in the graveyard plus 7.
{g}{g}{b}{b}{1}, destroy target creature and put a 3/3 Plaguebearer with Decay and Undying.