UESPWiki:News/Secrets of Alduin's Wall
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Secrets of Alduin's Wall — January 13, 2011
The wall seen in the Skyrim trailer is more than it seems! It is an "actual structure" in Skyrim and plays an integral part in the story, chronicling the history of Nirn, from a time when Alduin last ravaged the land, through its defeat by methods unknown, through more recent events such as the shattering of the Staff of Chaos, return of Numidium, battle under Red Mountain, and attack from Oblivion, to the spilling of blood by the sons of Skyrim in the Fourth Era and the return of Alduin. The details can be found on GameInformer's Skyrim site.