As he destroyed, he walked. With his fists he battered against a wall of metal and splintered it. He stepped through and walked toward the dynamos that were lazily rotating. Some of them already had come to a halt. Tyr touched the engines with his hands and summoned the energies of his body. The metal cracked under the strain of that superhuman power. Casings split and bearings crumpled. Tyr walked on. * * * * * The executioner threw the lever, and nothing happened. Katha laughed softly, and there was a light in her dark eyes that made Space Commander yearn. She whispered, "He has won!" Mason roared, "Throw the auxiliary engines over!" But the auxiliary engines were dead, too. Now the _ardth_-men murmured and whispered among themselves, for the unnatural quiet of the Citadel was hammering their eardrums. Footsteps sounded on the flagging. Something tall and something bright was crossing the Street of Space and entering the Square. It was shaped like a man, but its gleaming yellowness was so brilliant that it hurt the eyes to see it. "Tyr!" screamed Katha. Space Commander Mason shuddered and put a trembling hand across his eyes. He looked smaller, frail in his dark cloak, standing before the giant who was coming toward him. His officers fell away from him as Tyr came on. To one side a girl with an emerald necklace dropped and lay in a huddled heap on the ground. From the throats of the manacled Tryllans a roar went up. "Our god has come for vengeance!" "Yield, you _ardth_! Yield to Tyr!" "See how he shines in his glory!" Twenty feet from Mason, Tyr came to a stop, for fear that the heat his body emanated would blast the man. "Free Katha and Zarman and the others," the yellow giant said. Mason nodded. "Stay away from me," he warned Katha, seeing her leaping from the dais of the gallows. "I am still overcharged with energy. It will fade in a little while. Wait." Tyr looked at Mason. "Zarman will be governor of Lyallar. Otho must die. Fay--Fay will be banished for her treachery. Let her keep the emeralds. She will die if we take them from her. The Trylla will live in peace and friendship with the Earth peoples. It is my order." Zarman came forward and held out his hand to Space Commander Mason who took it thoughtfully. The man with the bald head swung on Tyr. "Then it is true what Katha said? You _can_ go near a sun? It makes your body like--that?" "It fills it with heat and light. And heat and light are energy. My body is energy, right now. Later, that peak of pure energy will fade. It will resume its normal look. But potentially, it is always as you see it now ... needing only a sun to make it so." Katha looked at Mason, across the cobblestones of the square. She said, "I told you Tyr is the one to renew the Glows. He would not die on a planet near enough to the sun for the elements we need."