Moratorium Stone is a rare Artifact card from Guildpact (GPT), collector number 154. Current market price: $0.15 (foil $0.88), TCGplayer market prices via Scryfall.
{2}, {T}: Exile target card from a graveyard. {2}{W}{B}, {T}, Sacrifice this artifact: Exile target nonland card from a graveyard, all other cards from graveyards with the same name as that card, and all permanents with that name.