Board Thread:Lore Discussion/@comment-116.102.112.51-20161213140036/@comment-173.81.113.240-20170217133733

The Nerevarine defeated the false Tribunal, mortals imbued with the other of Lorkhan's heart but by the time that he defeated them, they were already losing their powers thanks to Dagoth-Ur. Even then, their power compared to a fully empowered Daedric Prince is nil within their own realm, remember it took both Sotha Sil and Almalexia working together to banish Mehrunes Dagon back into Oblivion when he attempted to destroy Morrowind. Mind you, he had already caused a great deal of damage prior to that happening.

When coming down to it, the Nerevarine's immortality would make him more experienced in aspects of war and magic. He just cannot die of natural causes, that is far different than the immortality of a Daedric Prince in which they can never die. So the chances of marching any of the heroes against a fully empowered Daedric Prince without some sort of divine empowerment or plot armor, they would literally be squished like bugs.