golgari grave-troll enters the battlefield with a +1/+1 counter on it for each creature card in your graveyard.

1, remove a +1/+1 counter from golgari grave-troll: regenerate golgari grave-troll.

dredge 6 (if you would draw a card, instead you may put exactly six cards from the top of your library into your graveyard. if you do, return this card from your graveyard to your hand. otherwise, draw a card.)