Osiris is disappointed with the battle situation and concerned about the Witch of the North's hostility towards the young wizard. She loses interest in the magic buried under the Emerald City. After all, "Erebus would probably hog all of the magic, anyway..." What interests her is unleashing never-before-seen black magic on the young king.
Osiris (/oʊˈsaɪərɨs/; also Usiris), is an Egyptian god, usually identified as the god of the afterlife, the underworld and the dead. He was classically depicted as a green-skinned man with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive crown with two large ostrich feathers at either side, and holding a symbolic crook and flail.