Board Thread:Lore Discussion/@comment-24267938-20130323172448/@comment-26662848-20150131083127

173.230.161.244 wrote: For those saying Martin Septim created an eternal barrier between Oblivion and Tamriel, no he did not. In Skyrim, Daedra communicate with Mortals and physically manifest themselves, get drunk, cause hell, etc.

Dragonborn needs to take the throne. Martin Septim's sacrifice was in vain. Dagon is alive and he will come back. I have questioned that before. The fact that Daedra can contact the people of Mundus even after the events of the Oblivion Crisis.

But I believe that while they can make contact with people in Nirn, the Daedra themselves cannot enter Nirn in their physical form the way that Mehrunes did.