I am not as interested in magic.
I could be down with a scientific reason for a woman(women) to be growing to giant proportions such as an experimental medicine treatment.
However, at it's root I'd love to see a story about athletic/muscular giant sized girl fighting in a gladiator arena -preferably modern day as an underground fighting ring.
I tried this myself, but I am not good at the 'then she ducked, then she rolled" fighting and the nuance of slapping, hairpulling, cat-fighting that often differentiates a woman on woman brawl.
If I could read even a short story on the premise, I think I could learn from it and be inspired to write my own version of this.
It's also a novel concept and one I haven't seen much (Any) of on SOL.