Board Thread:Lore Discussion/@comment-25343239-20150128215539/@comment-25343239-20150129004751

Yes but here it says: http://elderscrolls.wikia.com/wiki/Oblivion_(Realm)#Relation_to_Tamriel

After the Oblivion Crisis however, the joined blood of Martin Septim and Akatoshstrengthened the barriers, so now the dragonfires do not need to be lit to keep the barriers intact. Many believed that this would permanently sever Oblivion from Nirn as a shrine or a mortal summoning is required to commune with the daedra.

During the Fourth Era, 200 years after the Oblivion Crisis, the barriers are apparently weaker. Daedric princes and high end daedra are physically manifesting on Nirn. Some manage this through use of a portal of sorts like Nocturnal and theEbonmere. Some high-end daedra such as Clavicus Vile's dog Barbas are able to manifest and live on Nirn, Hermaeus Mora was able to manifest himself through aBlack Book, and even Sanguine himself manifested under a mortal guise.

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So doesn't that mean Oblivion and everything that happened in it was for naught?

and can we agree that Vivec did nothing permanent to Azura, and thus did not get revenge? It looks more like he pulled some kind of prank...