Oujah, fear of Djarbal

Flying, deathtouch
{1}{b} sacrifice a creature: Destroy target creature. Activate this ability only during your turn and no
more than twice a turn.
{2}{b}{t}: Return target creature from a graveyard
to the battlefield under your control. You lose life
equal to that creature's converted mana cost.
"Give me blood, and I'll give you the strength to
serve me"