Earlier today I was scrolling through instagram reels and a badass clip from an anime popped up and I didnt save it and I want to find it again:

The scene was 2 people dueling, a boy with a katana and a girl wearing kendo armor with a wavy short sword (like a flamberge). The guy ran up and attacked and she just blocked his attack, when that happened an eye open on her sword and a ton of this red energy enveloped the two of them with a bunch of these eyes on it, staring at him. The eyes then faded away and the guy was in space, looking at a black hole or a galaxy or something like that before the scene cut back the their duel and the guy was like paralyzed and not responding

I've tried to find this for the last like 2 hours but no luck, pls help