EatChildren
Currently polling second in Australia's federal election (first in the Gold Coast), this feral may one day be your Bogan King.
Not really though. Let her walk over regular enemies like she did in TW3, or make the enemies more aware of her powers so they know how to adapt(run, cooperate more) but add a bigger, more powerful, more vast enemy that is the main concern of the game that won't make her look over powered.
Losing your powers at the start is such a cliché.
This would be fine as an idea but is nevertheless basically reimagining The Witcher to be The Ciri, which I can't imagine CDPR are interested in doing.