Ka-Mahkef, Lich King

At the beginning of your draw step, you may draw
two additional cards. If you do, choose two cards
in your hand drawn this turn. For each of those
cards, pay 4 life or put the card into your graveyard.
{w}{b}{g}: Attacking creatures your opponents control
get -X/-X until end of turn, where X is the number
of creature cards in your graveyard. If a creature
would die this way, exile it instead. You may only activate this ability once per turn.