Gix, Yawgmoth Praetor
Legendary Creature — Phyrexian Praetor, {1}{B}{B}
Oracle Text
Whenever a creature deals combat damage to one of your opponents, its controller may pay 1 life. If they do, they draw a card.
{4}{B}{B}{B}, Discard X cards: Exile the top X cards of target opponent's library. You may play lands and cast spells from among cards exiled this way without paying their mana costs.