Killing the Demon in Tomb of Souls

[Gobatcha]

I used previously posted procedures to hex edit for the Demon key that I failed to pick up from the thieves in the Naga Temple. The Demon key worked! The walkthrough for the Tomb of Souls is dead on regarding a helpful tip for defeating the demon.
I simply backed down the passage to the room with the sepulcher. Then plugged him with spells and arrows. That was taking FOREVER. So I walked up and started bashing him relentlessly. The demon was kind of stuck in the doorway. He launched a few spells, but mostly he was overcome by my attack to put up much of a fight, or he couldn't get his spells off. A great way to collect mucho experience.