Alander Asen, also known as the Turquoise Mage of the Shadowdale Spell Tower, is suffering from a curse. He complains of headaches then will shift forms into a demon. He has killed a man while in this form. He says he has no control over this other self. However he ran away when I tried to capture him. Be warned he is dangerous and has killed already.
*included is a detailed description of him*