On'vyal Zelvass, otherwise known as On'vyal the Studious, was a member of House Zelvass when it was the ruling power of Sanaris. Presumably killed in a rebellion from before the Age of Iron and Chains, On'vyal now rests in the Tomb of Zelvass in a small library of his favorite books. He was known for his studious and truth-seeking nature.
On'vyal was a leading voice in the field of life alchemy, and published a respected series of literature on the subject himself. Judging by the interest shown by the Library Devils, it might be assumed that On'vyal's research is not easy to come by.