Ripples of Undeath is a rare Enchantment card from Modern Horizons 3 Promos (PMH3), collector number 107s. Current market price: — (foil $12.87), TCGplayer market prices via Scryfall.
At the beginning of your first main phase, mill three cards. Then you may pay {1} and 3 life. If you do, put a card from among those cards into your hand.