The Plains of Ofrid on the planet Tarth stretched flat and monotonous as far as the eye could reach, a gently waving ocean of soft, knee-high grass where herds of wild stads grazed and bright-hued birds vied in brilliance with the flaming sun.
From the dark Abarian Forests to the Ice Fields of Nadia, the plain stretched unbroken except for the tall, gray tower in its exact center and it was toward this tower that various groups of Tarthans were now moving.
Every nation on the planet was represented in greater or lesser number. The slim, erect Nadians in their flat-bottomed air cars that could hang motionless in space or skim the surface of the planet at a thousand jeks an hour. The grim-faced Abarians, tall and finely muscled on their powerful stads, their jeweled uniforms flashing back the glory of the heavens. The Utalians, those chameleon men of Tarth, their skins now the exact color of the grasses across which they rode, thus causing their stads to appear unmounted and unguided.
All the nations of Tarth were represented, drawn toward the tower by a century-old legend, a legend which Retoc the Abarian clarified as he rode at the head of his own proud group.
He waved a hand, indicating the vast plain and spoke to Hultax, his second in command, saying, "Little would one think that this flat, empty land was once the site of a vast and powerful nation. One of the greatest upon all Tarth!" A smile of cruelty and satisfaction played upon his handsome features as he surveyed the plain.
"Aye," Hultax replied. "The realm of the Ofridians. Truly they were a great nation."
"But we Abarians were greater," Retoc snapped. "We not only defeated them but we leveled their land until not one stone stood upon another."
"All save the tower," Hultax said. "No weapon known could so much as scratch its surface."
A new voice cut in. "Quite true. Portox's scientific skill was too great for you." Both Abarians turned quickly to scowl at the newcomer, Bontarc of Nadia, who had swung close in his one-man car and was hovering by their side.
Retoc's hand moved toward the hilt of his long whip-like sword, driven there by the look of contempt in Bontarc's eyes. But Retoc hesitated. A formidable squadron of Bontarc's Nadian fighting men hovered nearby and the Abarian had no taste for a battle in which the odds were close to even.
"We defeated the Ofridians fairly," he said.
"And slaughtered them fairly? Cut down the men and women and children alike until the entire nation was obliterated?"
The systematic annihilation had taken place a century before when Bontarc had been but a child and Retoc a young man. Karnod, Retoc's father, now dead, had planned the war that defeated the Ofridians, his winning card having been spies in the court of Evalla, Queen of Ofrid. Karnod had been fatally wounded during the last battle and had delegated to his son the task of annihilating the Ofridians and levelling their nation. This task, Retoc accepted with relish, reserving for himself the pleasure of slaying Queen Evalla. Details of the torture to which Retoc subjected the beautiful Evalla were whispered over the planet and it was said the sadistic Retoc had taken photographs of the Queen in her agony to enjoy in later years.
It had been the scientific ability of Portox of Ofrid that had engendered the Abarian hatred and jealousy in the first place. Portox used his science for the good of all on the planet Tarth, but when Karnod, Lord of Abaria, struck, no other nation came to Ofrid's aid. Then it was too late, because Abaria's military might greatened as a result of the Ofridian defeat and only an alliance of all other nations could have conquered them.
Ironically, Portox had never been captured.
Now as the tall gray tower came into view, Bontarc's mind was filled with thoughts of Portox, the Ofridian wizard. It was said that Portox had been able to travel through space to other planets that were known to exist, that he had left Tarth and found safety somewhere across space, first building his tower which would never be destroyed; that a great clock within it was measuring off one hundred years—the time on the planet Tarth of an infant's development into manhood—and that at the end of that span the clock would toll and there would come forth a man to avenge the slaughter of the Ofridians.
Bontarc turned suddenly upon the dour Retoc. "Tell me," he said, "is there any truth to the legend that the clock in the tower will toll the end of one hundred years?"
"None whatever," the sadistic Abarian snapped. "A rumor passed from the lips of one old woman to another."
Bontarc smiled. "Then why are you here? The hundred years are up today."
Retoc's hand moved toward his whip-sword. "Are you calling me a liar?"
Bontarc watched alertly as the blade came partly from its scabbard. "If we fight we may miss the tolling of the clock," he said evenly.
With an oath, Retoc pushed the sword back into its scabbard and put sharp heels to his stad's flanks. The animal screamed indignantly and rocketed ahead. Bontarc smiled and turned his car back toward his own group.
And now they were assembled and waiting, the curious of the planet Tarth. Would the clock toll as it was rumored Portox had said? Would an avenger come forth to challenge Retoc and his Abarian hordes?
There was not much time left. Swiftly the clock ticked off the remaining moments and the end of one hundred years was at hand. Silence settled over the assembled Tarthans.
Then a great sound boomed over the plains; a single ringing peal that rose majestically into the air, reverberated across the empty land that once had been the site of a thriving, prosperous nation. The first part of the legend had been fulfilled.
Then, suddenly, chaos reigned. With a great thundering that shook the ground upon which they stood, the gray tower exploded in crimson glory; a great mushrooming blossom of red fire erupted skyward hurling the assembled Tarthans to the ground where they lay in numbed stupor.
The thunderous report echoed across the plain ten thousand times louder than the tolling of the clock. But aside from the initial dulling shock, no Tarthan was injured because the crushing power rose upward.
There was an expression of mute wonder on Bontarc's face. And he thought: We have not seen the end of this. It is only the beginning. But the beginning of what? Only Portox could have known. And Portox was—where?
Bontarc started his car and moved across the plain sensing cosmic events but not knowing....
Not knowing that the sound of the tolling clock had gone with more than the speed of light across the void, had been flung arrow-straight to a brooding mansion in the heart of a thick forest upon another planet; to the door of a cavern deep in the rock beneath the mansion.
That even now the lock of this door had responded to the electronic impulse and the huge panel was swinging slowly open.
CHAPTER III
The Man in the Cavern
As the sound of the tolling clock died out across the Plains of Ofrid, a man opened his eyes on the planet far away and saw for the first time the place in which he had spent one hundred years.
He awoke with neither fright nor surprise but rather with a sense of wonder. He arose slowly from the great bed upon which he had lain and allowed his attention to roam about the strange place in which he found himself.
In the wall opposite the bed there was set a full length mirror and as the man turned he saw himself for the first time; a tall, broadly-muscled figure of heroic proportions. Completely naked, his body was reflected as masculine perfection in every detail.
For a few moments, the man stared at the body as though it belonged to someone else. Then he spoke musingly. "You did your work well, Portox, my friend."
The sound of his own voice startled him but not so much so as the content of the words. A baffled expression touched his handsome face. Who was Portox? And what work had he done? What