[Suzerain of Sheol]

Oh, this could get interesting. I was planning to have us depart peacefully, but Mithaias might object to one of his test subjects up and leaving.. Then Kasdeja could get involved...

And about the being dead thing... it could possibly have any number of effects on him. Pain? Triggers long-dead (pardon the expression) memories/sensations? Personality shift? Actual physical injury or transfiguration of dead flesh? I think there's any number of directions you could take it in. Maybe even factor in the nebulous relationship between life and death that's going on.