Looking at the Nintey Percent Of Your Brain
article does things.
What if the "hidden potential" of the ninety percent could be unlocked, psychic powers and all that?
Problem is, you still need the functions currently provided by it.
Solution? Highly-invasive brain surgery to implant nanomachines or similar technology to provide stripped-down versions of the functions that the ninety percent used to provide before being modded into what it is now. Because who needs fine motor control or coherent long-term memories or the absence of audiovisual and tactile hallucinations when you can crush buildings with your mind? Wait as second.
The problem now is what to do with it. The brain damage could be debilitating, making the process impractical for use on anyone that wants sanity and/or free will afterward, making those so modified useful as servants or curiosities for the rich.
Or, the process could be fine-tuned and only viable for a small portion of society with a similar neurological makeup to the type the surgeons know the best. It would still have dramatic effects on anyone else, but unless the surgeon knows exactly what they're doing, it'll be very traumatic.
Basically, I'm stuck as to where to put this. What do youse guys think?
On a tangent, if you wanted to work with the straight version of the trope, you could just say that the powers unlocked replace the need for the other functions.