The power to have absolute control of a dimension or dimensions. Variation of Personal Domain and Dimensional Manipulation
User possesses complete control over one or several dimensions, and can manipulate everything within them including e.g. time, space, life, matter, energy, etc.
See Also: Dimension Lord
Pariah Dark (Danny Phantom)
Wall Demon (Valkyrie Crusade) has total control over her own personal dimension/space.
Dormammu (Marvel Cinematic Universe), ruler of the Dark Dimension.
Illyana Rasputin/Magik (Marvel Comics), the Former Queen and Ruler of the demonic dimension of Limbo.
Shuma-Gorath (Marvel Comics)
SCP-106 - The Old Man (SCP Foundation)
Dimentio (Super Paper Mario)
SCP-106 The Old Man (SCP Animation)
The Old Man - SCP-106 (SCP Animation)