The Chain Veil is a mythic Legendary Artifact card from Magic 2015 (M15), collector number 215. Current market price: $18.33 (foil $42.35), TCGplayer market prices via Scryfall.
At the beginning of your end step, if you didn't activate a loyalty ability of a planeswalker this turn, you lose 2 life. {4}, {T}: For each planeswalker you control, you may activate one of its loyalty abilities once this turn as though none of its loyalty abilities have been activated this turn.