Help coming up with ideas and concepts for powerful magic users and their towers

[Bohandas]

Oneiromancer/Dream Mage
The tower is a dream pulled into the material plane. The internal layout is mazelike, and slowly but constantly shifting. It seems to be cobbled together out of several other random buildings, and may include some rooms that should (based on their placement relative to the other rooms) occupy the same space as each other, but nonetheless do not. Many of the rooms have incongruous features, such as staircases in private rooms (sometimes leading to finished basements, despite the main rooms not being on the first floor), rooms that are missing key features (such as an armory with no weapons or equipment but plenty of places where such things could be placed), rooms with multiple incongruous or incompatible functions (such as a guardroom that's also a kitchen {not for the guards}, or a prison cell that's also an observatory), or conversely rooms with interdependent functions (such as a pantry, kitchen, and dining room) that are impractically far from each other. The tower has many floors that are either unused, unnecessary, abandoned, forgotten, and/or inhabited by creatures other then the tower's usual denizens and who don't seem to interact with the tower's main denizens. The tower is also stocked with incongruous goods and furnishings, such as a trampoline with furniture set up on it, objects that are made out of raw sewage, things set off by fuses which have no business being set off by fuses (such as a door that is opened by lighting a fuse which sticks out from the keyhole, or a book that can only be opened by lighting a fuse attached to its cover, or a sundial which doesn't cast a shadow until a fuse burns down to its gnomon), chicken nuggets that are actually live cockroaches covered in (cooked) breading, weird fruit that turns you into a monster if you eat five of them (over any time period) but doesn't do anything if you eat less than five, various strange but powerful artifacts that fade away into to nothing if removed from the dream, and a fireman's pole that's actually a very tall scratching post. The building also has several unnecessary and impractically located swimming pools, bizarrely large restrooms, an elevator consisting of a shaft inhabited by a colossal trained snake with an elevator car strapped to its head who slithers up and down the elevator shaft, and a gladiator arena in which the strange spiky beast that the gladiators must fight doubles as both the emcee and the VIP in the Cubiculum.