It's a quick death. He has only seconds of warning, his mage-senses screaming at unfamiliar horror, a dozen observations flickering through his mind, no time to sort through them or process them or interpret what he's Seeing.
And then pain, but not for long.
In that last second, Adept Kiyamvir Ma'ar has time only for one real thought, which is that he screwed this up even worse than he could have imagined. He thought everything was lost, when he learned of Urtho's fiery death; he thought the worst had already happened, and there was almost relief in it.
He was so, so wrong.
The dark nothing is almost a relief.