Curator Beastie is a rare Creature — Beast card from Duskmourn: House of Horror Commander (DSC), collector number 30. Current market price: $0.28, TCGplayer market prices via Scryfall.
Reach Colorless creatures you control enter with two additional +1/+1 counters on them. Whenever this creature enters or attacks, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)