Silent Hallcreeper is a rare Enchantment Creature — Horror card from Duskmourn: House of Horror Promos (PDSK), collector number 72p. Current market price: $1.99 (foil $2.10), TCGplayer market prices via Scryfall.
This creature can't be blocked. Whenever this creature deals combat damage to a player, choose one that hasn't been chosen — • Put two +1/+1 counters on this creature. • Draw a card. • This creature becomes a copy of another target creature you control.