I spend the next day telling him basic facts about my world, and learning about his. Turns out the initially Lecherous seeming old man has touched on the divine realm, and only remains here to look for a disciple to pass on his learning. His name is Po'En, or as he preferred me to call him, Master Po or Elder Po.
His forbidden technique uses emotions to cultivate. The stronger the better, so he spent most of his life in a dual cultivation sect, but found at the later stages that the desire to live at all costs was more effective, so he joined the Shadowed Blade Sect of assassins. The training is brutal, plus they torture captured prisoners.
Perfect for him. But also prefect for me. Lots of Death Energy to take from others.
What I don't mention is the Dragon Church. Best he doesn't know what these robes represent with his world having only humans and non sentient monsters according to his description.