The Dreamsleeve (also known as the dreaming-sleeve) is an obscure and rarely mentioned concept or construct. Two widely disparate functions have been ascribed to it, though they are not necessarily mutually exclusive.
The Dreamsleeve has been described as a conduit for sending special transmissions, used by magicians and Imperial clerks. To reach it, one must have at least part of their brain constantly meditating, as one aspect of the conduit is its ability to carry images of concepts not yet "real".[UOL 1] During the Imperial Simulacrum, Daedric Prince Mehrunes Dagon's forces invaded Nocturnal's realm, Shade Perilous, on their way to taking the Battlespire. As a result, Nocturnal Lieutenant Jaciel Morgen fell into a deep despair and drove her own spirit into the Dreamsleeve. This left the Daedra physically present but mostly unresponsive, as if in a deep sleep. Only the self-sacrifice of her servant Deyanira Katrece was enough to awaken her.
According to the teachings of Mankar Camoran, "mortals leave the dreaming-sleeve of birth the same, unmantled save for the symbiosis with our mothers". It is through the abandonment of the mother that mortals therefore enter the domain of Lord Dagon, the Prince of Destruction.
- Unofficial fanfiction and developer texts describe the Dreamsleeve as a process related to the cycle of death and rebirth, whereby souls are recycled within the Mundus.[UOL 2] It is utilised as a rapid means of magical communication, related to telepathy and "Memospores".[UOL 3][UOL 4][UOL 5]
- Events of Battlespire
- Deyanira Katrece's dialogue in Battlespire
- Mythic Dawn Commentaries 1 — Mankar Camoran
Note: the following references are not from official sources. They are included to provide a rounder background to this article, but may not reflect established lore.