Necropotence is a mythic Enchantment card from Iconic Masters (IMA), collector number 98. Current market price: $38.47 (foil $95.97), TCGplayer market prices via Scryfall.
Skip your draw step. Whenever you discard a card, exile that card from your graveyard. Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.