Not-sure if you still need help but if you do here it is. You could have the main villain being a shape-shifter who is simply obsessed with power...
You could have the idea it helps the wielder perceive reality more like notice little things and plots by the enemy or it produces an aura that...
Perceived power could also mean it changes the person more into who they wish they were or think they are but they can't control it. This would be...
You could have it as perception of time as in it slows people around him/he speeds up, his perception of reality is enforced upon the world...
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