Mind Drain is a common Sorcery card from Zendikar Rising (ZNR), collector number 114. Current market price: $0.17 (foil $0.27), TCGplayer market prices via Scryfall.
Target opponent discards two cards, mills a card, and loses 1 life. You gain 1 life. (To mill a card, a player puts the top card of their library into their graveyard.)