Ritual of Blood

As an additional cost to cast this spell, sacrifice a creature. Exile that creature at the beginning of
the next end step.
Add {b/r}{b/r}{b/r}.
"Oh great one of the Burning Darkness. With this offering of innocence, open the gate for the eldest of
them all. May his flames purge the world of the
heathens who have wronged you for far to long."