Gix, Yawgmoth Praetor

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.
"The flock must feast..."