Powers and Stats
Origin: The Elder Scrolls
Classification: Daedric Prince of Lies, Secrets and Plots, arguably the Night Mother of the Dark Brotherhood
Powers & Abilities: Superhuman Physical Characteristics, Immortality (Types 4, 9 and likely 5, due to existing outside Arkay's cycle of life and death and this text ), Regeneration (Low-Godly), Reality Warping, Soul Manipulation, Probability Manipulation, Telepathy, Telekinesis, Time Manipulation, BFR, Abstract Existence, Conceptual Manipulation, Acausality (According to Fa-Nuit-Hen, Daedra are not bound by time, cause and consequence in their natural state), Resurrection (Scaled from Molag Bal, who has shown the ability to revive the dead with their faculties intact, both in Oblivion and Skyrim), Immune to Soul Manipulation (Daedra lack souls)
Weaknesses: Cannot manifest her full power in Mundus
All Daedric Princes are comparable to Akatosh, whose power possibly extends into most of Oblivion, which contains infinite realms.
The Princes are believed to rank somewhere within Tier 2. However, the inconsistent nature of the lore makes it difficult to be any more specific.