Dreadhound is a uncommon Creature — Demon Dog card from Jumpstart 2022 (J22), collector number 406. Current market price: $0.36, TCGplayer market prices via Scryfall.
When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.) Whenever a creature dies or a creature card is put into a graveyard from a library, each opponent loses 1 life.