Little is know of his skill or magical school. Based only on what was seen of his abilities he is adept in using Fire Magic.
Not much is known about Orrin. He appeared temporarily from a stone statue on a hill in the town of Rell when it was attacked by an undead hord. The only person he is known to have talked to before disappearing is Rapp Silvertooth. He claimed to have trapped himself in a statue for over 700 years to prevent death by aging but disappeared shortly after emerging from his stone form.