Board Thread:Lore Discussion/@comment-71.82.250.138-20130206082748/@comment-66.249.80.222-20140424064827

Yagrum was on an outer plane when Kargnac used his tools in the Heart. It's likely that what ever happened to make the dwarves disappear was limited in range, got all the dwarves in Mundus and maybe some of the closer planes but Yagrum was to far out to be effected. As for what happened to the Nereaine he traveled to the continent of Akvir and was never heard from again.

As for the Dwemer, they where trying to ascend, to gain immortality like the Gods. Kargnac's tools where meant to be used to harness the power of the Heart, which was used by both the Tribunal and Dagoth Ur to gain immortality so it wasn't using the Heart it self that caused the Dwemer vanish. The Dwemers goal was to essential ascend, to become immortal and become like gods. They where trying to reshape reality...