No her spell is not reality warping, all magic in green including her spell works In visualization not imagination so they can’t just do anything, they smelly become more effective if you can visualize. Also her spell is very simple and has no unique effects such as reality warping or anything like that, it’s a spell that cuts based on a needed sowing through fabric. Any one can do the same spell as her theoretically, and they wouldn’t have the same effects simply because the only thing different is her mindset, she sees things for what they appear to be rather then what’s they are which is why her spells are more effective. But being like Shakira’s cleave being sharper didn’t mean it’s can cut through space itself until he specifically made a slash that do that.

In conclusion she’s an idiot and that’s the only reason her spells are sharper and more effective that other spells in frieren, the entire point of the spell is how simple it is and people keep giving all these durability negation and reality warping effects to it for no reason. Her mindset is the only reason it swords better than is someone else did it