Even though he has a basic understanding of how the tools worked, he used keening and boom, he disappeared. Did he reach chim like the dwemers or did he got teleported elsewhere(e.g. soul cairn)? I believe he isnt dead though as there isnt ash piles. And what is the deal with Arniel's Shade?

He accidentally bound his soul to the closest object of mythical power, the Dovahkiin.

He kappoofed.1-1=0.