Jenso smiled as they managed to damage Prisma. But it would all be pointless if they didn't manage to destroy the core. Jenso took this oppertunity to fly downwards and fly low, right above ground. He created another razor yo-yo within his hands, soaring further to Prisma's right. He made sure to stick close to Prisma's back as he moved, in hopes that Prisma wouldn't fire at his own body, or at least not spot him. 

He dipped the omega saw on the end of his yo-yo into the puddle of molten rock, coating it with magma. He launched it at Prisma's right shoulder from behind. He flew further to the left afterwards, and yanked his whip twice. The whip would reel in the omega saw, and cut straight through the back of Prisma's neck for a second cut, if it had been able to pierce Prisma's right shoulder with it's first strike, to pull it back towards Jenso. He hoped Bruce's creature would keep Prisma distracted long enough to do so.