Ripples of Undeath is a rare Enchantment card from Modern Horizons 3 (MH3), collector number 455. Current market price: $9.46 (foil $15.27), 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.