 While the Winchesters search for other ingredients, Castiel searches for fruit of the Tree of Life in Syria.After finding the tree, Castiel fought and killed most of the Djnn clan that was guarding the tree and bargained with the survivors, possibly leaving Castiel married to their queen.Castiel then returns to the Bunker in Scoobynatural, where he is sucked into an episode of Scooby-Doo, Where Are You!