Baptiste?
When Lily mentioned the name, Hao Ren froze. He found the name familiar, but he could not remember where he had heard it until Lily nudged his arm and whispered "Inferno".
Yesterday's planet Inferno was today's World Gate-Surface World monitoring center. The incredible planet, once stuck on the Wall of Reality, was named Inferno because of the terrible environment on its upper crust. It came to Hao Ren's attention because of a wizard named Baptiste.
Baptiste was active in France during the medieval period before he mysteriously disappeared for hundreds of years. He used magic to engulf an entire town, from which he obtained the power to open a portal to Inferno. Baptiste did not even blink an eye about turning himself into an immortal but cursed creature just to find his mentor cum lover, who fell into Inferno during a magic-related accident.