Mjölnir's Might is a common Sorcery card from Marvel Super Heroes Commander (MSC), collector number 697. Current market price: $0.28 (foil $0.29), TCGplayer market prices via Scryfall.
Mjölnir's Might deals 4 damage to target player. Exile the top card of your library. Until the end of your next turn, you may play that card.