Nocturnal is the Daedric Prince of Night, Darkness and Luck
Powers and Stats
Origin: The Elder Scrolls
Age: As old as or older than the universe
Classification: The Ur-Dra, Night Mistress, the Mistress of Shadows, The Unknowable, Empress of Murk, Daughter of Twilight, The Mistress of Mystery, The Saint of Suspicion, aspect of the original Void
Powers & Abilities: 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, Enhanced Senses, Omnipresence, Void Manipulation, Soul Manipulation, Telepathy, Telekinesis, Darkness Manipulation, Time Manipulation, BFR, Probability Manipulation (Has control over luck), Abstract Existence (Embodies darkness & mystery), Conceptual Manipulation (Has control over darkness, mystery and luck), 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)
Lifting Strength: Immeasurable
Striking Strength: Unknown
Intelligence: Very High
Weaknesses: Cannot manifest her full power on Mundus
Standard Equipment: Skeleton Key, Grey Cowl, Bow of Shadows, Nightingales, her ravens
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.