Ark of Hunger is a rare Artifact card from Secrets of Strixhaven Promos (PSOS), collector number 173p. Current market price: $0.36 (foil $2.51), TCGplayer market prices via Scryfall.
Whenever one or more cards leave your graveyard, this artifact deals 1 damage to each opponent and you gain 1 life. {T}: Mill a card. You may play that card this turn.