Azaz'zel, the White Harbinger

Deathtouch First Strike
{2}{b} Select any creature and apply a -2/-1 marker to it, which is valid until your next turn, then, reveal the first card of your library, if it's a creature, sacrifice it to either add a +1/+1 marker to a creature under your control, or add a {c} mana to your pool, if not, return it to your library and reshuffle it.