Ranavath, Plague Priest

Whenever a creature enters the battlefield under your control, if it entered the battlefield from your graveyard, put 3 +1/+1 counters on it. It gains haste until end of turn.
{u}{b}{t}: Sacrifice two creatures and exile three cards from your graveyard. If you do, return target creature from your graveyard to the battlefield.
I am not pure nor plague. I am both.