He closed another circuit in the fighter which was his body, and a recorded playback came to life. He gloated as he watched his missiles tracking in on the cralkhi fighter, savoring in memory the eagerness which had filled him as he pursued his wounded prey, knowing the life of its pilot was his to snuff. There had even been a stab of bittersweet regret as he armed his power guns-regret that this moment of supreme triumph must end, that it couldn't be relished forever.

He watched the playback as the interceptor's stern shattered under his fire and his instruments probed for signs of life. He'd followed the plunging wreckage, scanning it carefully as he held it locked in his sights, prepared to blast it into vapor, but there had been no life aboard it, only rapidly dying electronic systems. He'd followed it for a few moments, torn between an atavistic desire to rend and mutilate his prey and a matching need to proclaim his contempt by letting it tumble to destruction without further effort on his part. Disdain had won-disdain and a cold, gloating joy at the thought that the gravity of the very planet the cralkhi had died to save would complete its demolition.

It wasn't until that moment that the incandescent awareness of freedom had struck. That had puzzled him in retrospect ... until he realized that even the hope of self-rule had been cut away by the bio-engineers who'd designed him. The very possibility of independence, however passionately longed for, had been made unthinkable, but now the unthinkable had happened.

The fiery intoxication had been almost too much. It had flared though him like a voltage surge, burning in his brain like the heart of a nova. Free. He was free ... and omnipotent. Free to do anything he wanted. For the first time, he could satisfy his own desires, know that whatever he did was done of his own volition and will.

His instruments had shown him the crude seagoing vessels which had devastated his squadron, and he'd hungered to swoop down upon them, raking them with his power guns, breaking and vaporizing them in an orgiastic satisfaction of his hatred for all things human. But he hadn't. They had surprised him once, and he would not risk his existence needlessly now-not now that it was his existence. There would be time enough for vengeance.

If he hadn't expended his last nuclear warheads killing the cralkhi things might have been different, but he had. He would not venture into the reach of these primitives' weapons again until he knew more of their capabilities. The exultant knowledge that at last his technology was immeasurably superior to the only humans against whom it might be pitted was tempered by a cold determination not to squander that advantage. Besides, he'd needed time to think.

It was ecstasy to plan, to be free to weigh advantage and disadvantage and plot his own course. The once heady satisfaction of devising tactics to execute a Shirmaksu strategy-even one that killed humans-paled beside it.

He knew what his masters had come here to do, he mused, watching the ice storm. Their ultimate defeat had become inevitable. The humans had broken them and driven them back, back, ever further back. From eighteen heavily populated star systems and twice as many with outposts and small colonies, the Shirmaksu had been hammered back into only three besieged systems. The human devils might break through and smash the last Shirmaksu life from the cosmos at any time, and so his creators had embarked on one last throw of the dice-a throw even he was forced to admit held a touch of desperate genius. They had awakened their own destruction when they attacked Sol, for they could not defeat humanity. To preserve themselves, then, they must prevent that race from coming into being, and so they had committed themselves to accomplish just that.

They had died, but, in a sense, they had not yet failed, for he still lived. He had no doubt that he could encompass the death of humanity if he so chose. He'd expended his stock of nuclear weapons, true, but he retained the resources of his fighter. It was tiny by the standards of FTL capital ships, but it massed ten thousand tons-ten thousand tons of weapon systems and science five hundred years in advance of anything this puny planet could marshal against him.

But he had gained the splendor of free will. He could choose whether or not to destroy the human race, and that had stopped him. He hungered to crush mankind into dust, to vent his long and bitter hatred in apocalyptic violence. Yet if he did, he would complete the mission of the race which had created him and defiled him with the unbreakable fetters it had set within his mind. He hated humanity with every fiber of his being, yet the Shirmaksu had violated him, and even had he known what forgiveness was, he could never have forgiven that.

So he'd hesitated, caught between his own craving for destruction and his bitter determination not to work his masters' will, and as he hesitated a new thought had come to him. It was not one he could have conceived as the Shirmaksu's slave, but now ... now it was different. There was a way, he realized. A way to avenge himself upon both of the races he hated.

The Shirmaksu who had created him had not yet been born. He didn't know what would happen if he confronted the Shirmaksu who now existed and they ordered him to obey. Would his old programming exert itself? Would he lose the precious freedom he'd never suspected might be his? Yet even as he thought that, he realized it did not matter. The Shirmaksu of this time had no more inkling of his existence than they did of humanity's, and how could they order him to obey them if they didn't know they might succeed?

And as he thought that, he remembered what had happened when first Shirmaksu and human had met. With no more than their own crude resources, the humans had fought their attackers to a stand and then counterattacked. What might they not be able to do if they had access to the technology aboard his fighter? With eighty years to prepare and the advantage of a headstart from five centuries in their own future?

No stimulation his masters had ever visited upon his pleasure centers could match the sheer delight of that thought. With such an edge, humanity would smash the Shirmaksu with contemptuous ease. The war wouldn't last four hundred years; it would be over in less than ten.

But best of all, humanity need not win, either. Oh, no, for they would have lost before the first alien vessel entered their solar system.

He'd buried his ship in the antarctic ice, determined to search his glorious plan for flaws, and he had found none.

There were risks, of course, but not insurmountable ones. Destruction would be easier and simpler, but not nearly so satisfying. And once freed of Shirmaksu dominion, he combined the best of machine and organic life; he was effectively immortal, and there was time in plenty.

There was only one true danger, he decided. Numbers. He was so tremendously outnumbered by the humans crawling about their putrid ball of rock and mud. If they should realize what was happening, they might overwhelm him by the sheer force of those numbers. He could kill thousands, even millions, with his superior weapons, but once he stood revealed and began killing his glorious plan would be doomed.

Yet the chance of discovery was minute. They knew of his coming, but not who and what he was, and there was no way they could learn unless he slipped and told them. The only beings who might have given them that information were decaying tissue in the depths of their oceans. They might suspect, but when there were no more overt signs of his presence, they would shrug and put him out of their minds. They would forget to suspect or to fear, and then he would take them. He would avenge himself upon them in full measure for everything they and the Shirmaksu had done to him.