Moldgraf Millipede is a common Creature — Insect Horror card from Duskmourn: House of Horror Commander (DSC), collector number 188. Current market price: $0.27, TCGplayer market prices via Scryfall.
When this creature enters, mill three cards, then put a +1/+1 counter on this creature for each creature card in your graveyard. (To mill three cards, put the top three cards of your library into your graveyard.)