Wedding Ring is a mythic Artifact card from Doctor Who (WHO), collector number 213. Current market price: $9.42 (foil $10.35), 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.