Wedding Invitation is a common Artifact card from Innistrad: Double Feature (DBL), collector number 527. Current market price: $0.42 (foil $4.68), TCGplayer market prices via Scryfall.
When this artifact enters, draw a card. {T}, Sacrifice this artifact: Target creature can't be blocked this turn. If it's a Vampire, it also gains lifelink until end of turn.