Jynthor said:
I haven't read all Obscure texts but from what I've read most are what I wouldn't consider canon, as for the Nu-Mantia, I really don't know what to think. Space Ship? Err. And what was this Dreamsleeve thing going on? I thought the Dreamsleeve was where souls got... "recycled" Yet people can communicate through it?(Techno babble included) It's all rather confusing.
To simplify it
According to Oblivion Dagon could invade Tamriel because the dragonfires were out because no dragonblooded king sat on the throne. The problem with this is that there have been centuries of time were no dragonblooded king sat on the throne, and thus no dragonfires, and yet the Daedric lords didn't just go stomp happy on Tamriel. This creates a massive plot-hole.
To solve the problem MK created the "towers" out of things destroyed in previous ES games. The towers are a series of objects, powered by stones, that hold up the mortal world, the first being Adamantine Tower, others include: White-gold, Red Mountain, Numidium, Crystal tower, the throat of the world, etc. etc.
When the towers are active they keep the barrier between Mundus and Oblivion, known as the luminal barrier, strong, explaining why the Daedric lords couldn't invade and destroy the world when the dragonfires were out in the past. However as each one falls so does the protection it provides, the dragonfires going out was not not the sole reason Dagon could invade, it was merely the last straw.
Each of the main ES games, except the first, has resulted in the Fall of a tower.
Daggerfall had Numidium destroyed
Morrowind had Red-Mountain go dormant when its stone, The Heart of Lorkhan was freed
Oblivion had White-gold go dormant after the amulet of Kings was destroyed
Skyrim had the throat of the world go dormant because of .... something.
Beyond that other towers were confirmed to be destroyed in the past. Orchalic tower was destroyed when the Redguards destroyed Yokuda, Crystal tower was destroyed by the daedra during Oblivion, but before Martin went god-mod at the end, Gree-Sap, the ancient walking tree city of the Bosmer called Flinsti stopped moving since recorded time and rooted itself shortly before Oblivion.
The towers were also mentioned in the Skyrim book "The book of the Dragonborn"
http://uesp.net/wiki/Skyrim:The_Book_of_the_Dragonborn
When misrule takes its place at the eight corners of the world
When the
Brass Tower walks and Time is reshaped
When the thrice-blessed fail and the
Red Tower trembles
When the Dragonborn Ruler loses his throne, and the
White Tower falls
When the
Snow Tower lies sundered, kingless, bleeding
The World-Eater wakes, and the Wheel turns upon the Last Dragonborn.
It is worth noting that NOWHERE before MK made the Nu-Mantia intercepts was Numidium, Red-Mountain, or The Throat of the World called towers.
.
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Also the dreamsleve is part of Atherius, the realm of magic, were souls go to get recycled and thrown back into the mortal world, high level wizards can highjack their thoughts into it to communicate with each other.