Bruce leaned forward into his run, instinct rather than any sort of sense telling him that danger was approaching from behind. He  dug the tip of his blade into the metal, skirting in a circular motion and skating on the smooth surface to take a sharp turn to the left, his body doing an about-face so he saw the blasts and Prisma's double behind him. He glanced again at the core, still moving across the metal ground. He drew up his blade in front of him at an angle, ready in case Prisma's clone came at him. And with his other hand, he brought down his mace onto the metal ground with a might blow, testing to see how the core responded to reverberations.