Golgari Grave-Troll is a rare Creature — Troll Skeleton card from The List (PLST), collector number UMA-167. Current market price: $0.86, TCGplayer market prices via Scryfall.
This creature enters with a +1/+1 counter on it for each creature card in your graveyard. {1}, Remove a +1/+1 counter from this creature: Regenerate this creature. Dredge 6 (If you would draw a card, you may mill six cards instead. If you do, return this card from your graveyard to your hand.)