Cruisers massed together, we were leaping back, now, back toward the spinning worlds, and toward the great crescent-formation of cube-ships that faced us now. Before those thousands of cube-ships had grasped what had happened, before they could turn, could change their formation, our compact mass had driven into them. Then cruiser thousands and cube-ship thousands were spinning and striking and mingling together, smiting with black force-beams and crimson bolts in titanic battle inside the tremendous electrical coma, whirling and stabbing in awful combat, the comet-creatures for their comet and we for our universe! Comet and galaxy had come to grips at last as those two huge fleets caught and struck at each other! Cubes and cruisers swirled and ran about us as our own cruiser struggled through the wild ruck of the battle, our own black beams stabbing to smash back cubes before and beside us, while through the speech-instruments before me I cried orders to my mighty fleet, directing the masses of cruisers that leapt and struck and soared at the great square cubes about us. All space outside seemed a single giant mass of struggling cubes and cruisers, cut across by blasting crimson bolt and ebon beam, yet ever we were forcing the cube-ships back, back over their ring of revolving disk-worlds, back over their mighty central world, and then down toward it as they fought fiercely against our black beams which drove great paths of destruction through them! The surface of that world was looming clearer beneath us, bathed in white revealing light, as the giant battle swung lower down toward it. I glimpsed the great circular clearing, the pyramid with the mechanism and comet-guards on its summit, knew by the dial before me that but minutes still remained to turn aside with it the colossal on-thundering comet. Lower we swung toward the clearing, and as we did so the cubes beneath stiffened against us, their uprushing hail of deadly red bolts stabbing like an upward-falling rain of crimson death! But still more deadly were the black beams that drove down through them from our ships, and they were giving a little before us, sinking lower still, when suddenly from the surface of the world below there rose up among them another cube, one vastly greater than any of the others, one that moved ponderously up to the center of the cube-ship fleet and then glowed suddenly with a brilliant light. And as it did so the thousands of cube-ships beneath us suddenly vanished! Disappeared from sight as though they had never been, leaving below us only the spot of brilliant light that marked the greater cube! "That great cube!" Jurt Tul was crying. "It's a vibration-projector of some kind, one whose vibrations make invisible all the cube-ships around it and leave our ships and all else visible! And they're attacking now!"