Priest of the Demon Cult

-If you used {b}{b} in Priest of the Demon Cult's mana cost target player loses 4 life.
-If you used {w}{b} in Priest of the Demon Cult's mana cost target player loses 2 life and you gain 2 life.
-If you used {w}{w} in Priest of the Demon Cult's mana cost you gain 4 life.
You don't realize whois in charge until it's too late.