Constantine, King of Luck

Eminence- As long as Constantine, King of Luck, is in the Command Zone or on the battlefield, Angel and Demon spells you cast cost {1} less to cast.
Pay 6 life and sacrifice a creature: Target player puts a number of creatures, artifacts, and enchantments from their graveyard equal to the power of the sacrificed creature in to play. Activate this ability only once per turn and only when you could cast a sorcery.