Kythsis, Scion of Rakdos

Haste
Whenever a creature that isn't a Demon, Imp or
Devil enters the battlefield, or blocks, Kythsis,
deals 1 damage to that creatures controller.
{b}{b}{r}{r}, {t}: Reveal the top 4 cards of your
library, put one of them into your hand, and one
into your graveyard. Exile the rest. Then you
lose 1 life for each card in your hand.