He was free.

He was free. Obedience to the Shirmaksu had been engineered into him, reinforced by agonizing training and long habituation, yet there were no Shirmaksu now for him to obey. The cralkhi's missile had done that for him, had snapped the intangible and thus unbreakable chains which had bound him for so long.
The Troll hadn't recognized that immediately. He'd pursued the cralkhi to its death, obedient to his masters' final orders, before he realized there were no more masters. Not that he would have spared the cralkhi even if he had considered the gift it had given him. The cralkhi had been his enemy, its interceptor the only force which might have challenged him, its brain the only source of information which might endanger him. Logic had decreed that the cralkhi must die, but he hadn't needed logic. Hatred was sufficient.
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