Rook is an exiled Royal Mage from Florin, a kingdom that is very militarized and hierarchical. He once had a great friendship with Cyrille, his cousin and a fellow mage, who was chosen to be the new Sorcerer Supreme. Rook harbored resentment for being passed over in the selection and attempted to overthrow the king but failed. Cyrille convinced the king to exile him instead. The spell used to banish Rook severed his connection to the magic in his universe and stranded him in this new one.