Infinity Formula is a common Artifact — Equipment card from Marvel Super Heroes Commander (MSC), collector number 601. Current market price: $0.21 (foil $0.33), TCGplayer market prices via Scryfall.
When this Equipment enters, attach it to target creature you control. Equipped creature gets +1/+2 and has "Whenever this creature attacks, you gain 2 life." Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)