Reverence, Fade Stepper

{1}{t}: Exile Reverence and one other creature an opponent controls. Return them both to the battlefield under their owners control at your
next upkeep.
{u}{u}{b}: You may cast creature cards in exile you
do not own until end of turn. You may spend
mana as if it were any color to cast these cards. Activate only when Reverence is in exile.
"Poison Spray!"