Originally posted by Q99
Dial H for Hero or other people with literally variable powers, like Black Alice, who's power is extremely dynamic.GL rings have two variables that dynamically decide their power: Will and Charge. Either of those can go up or down (the Charge seems to have reduced the power of individual GLs after the corps reformed).
Some other characters have power that depends on emotional state, like Raven.
Achilles from Wonder Woman explicitly increases or decreases in power somewhat based on resolve and confidence (the whole 'Achilles in the Tent' thing from the old myth).
Raven's powers aren't really emotionally driven in comics.