Liliana, Lifeless Lich

+1: Target player discards a card. If that player can't, that player loses 2 life.
-3: Search your library for 2 cards. An opponent chooses 1 card. Put that card into your hand and the other into your graveyard, then shuffle.
-7: Each opponent loses X life, where X is 13 minus the number of cards in their hand. You gain 13 life.