Wedding Ring is a mythic Artifact card from Doctor Who (WHO), collector number 468. Current market price: $10.35 (foil $11.34), TCGplayer market prices via Scryfall.
When this artifact enters, if it was cast, target opponent creates a token that's a copy of it. Whenever an opponent who controls an artifact named Wedding Ring draws a card during their turn, you draw a card. Whenever an opponent who controls an artifact named Wedding Ring gains life during their turn, you gain that much life.