Awaken the Dread Sower

As an additional cost to cast this spell, sacrifice a creature
Search your library for a card and put it into
your hand. If it was a Demon, you may cast it
without paying it's mana cost, then create a token that is a copy of the last creature you sacrificed this turn
"The ritual was complete, and Sheoldred watched as Draltar rose out of Sokenzan's largest mountain"