Alma, Worshiper of the Unholy

You may pay {b}{b}{r}{r} rather than pay the mana cost for demon spells you cast.
{1}{b}{b}{r}{r}, {t}, Sacrifice Alma: Create a 6/6 legendary demon creature token with trample
and flying named Alma, Overlord of the Unholy.
I am but a mere mortal for now, but soon you will see me ascend to a being more powerful than a god!