Styx, the River Forged

Equip {p/b}{p/b}
Equipped creature gets +6/+3 and has
deathtouch, lifelink, firststrike, annihilator 3.
When equipped creature attacks search your
library for a demon, devil, or fiend card put it
onto the battlefield or into your hand.
Whenever a demon, devil, or fiend enters the battlefield gain five life, and if you don't control
it gain control of it.
"A blade from the depths of hell itself."