This fact is considered to be one of the most dangerous secrets about the natural order of the world, and is therefore closely guarded by the Demon of Knowledge Hermaeus Mora. When a mortal dies, his or her memories become water, and in this way all the memories of Tamriel's histories are stored within its waters. Water Magic is an obscure and little-known form of magic involving the manipulation of water. Viewing windows created by Argonian water magic
