A manga does its best to deliver expressions and other details. Ichiji's move/attack needs clarification. The only way to see through is when it gets animated, but I put my money on the studio won't be able to deliver what Ichiji did and how his attack does work. The best thing you better notice is that the seemingly lights beam pierced through the enemies' bodies, specially Oven which looks like it got through his chest or close to, and seeing blood gush.I don't really understand what his power is.
The sparking streak from his eyes indicates that he moved super fast. So fast that he left a trail.
But all around him are like laser beams puncturing the enemies, and it looks like it's coming from his hands.
The technique is translated as spark light fists, but he has open hands in the picture.
So I don't know if I should see this as a high speed punching technique leaving explosions/sparks like Ideo, or if he is shooting lasers like Kizaru/kuma from his hands.
How good of a writer do you have to be to get your readers to mimic the in story charactersLuffy didn't defeat Katakuri; that's a lie.