The classic Mad Scientist is a Devisor. The devisor can create anything as long as they have a coherent theory of how it works. That theory doesn't have to correspond to the actual Laws of Physics, and in fact it almost never does. In some ways, the Devisor trait can be compared to the magical Law of Definition. This process is called the "Schimmelhorn Effect," after a character in a science fiction series named Papa Schimmelhorn. As Adam Savage says, "I reject your reality, and substitute my own."