Black sand clustered across the sunny plain as Blade rode out the central gate of the wall. The wall was lined with Caths, thousands of them. In the great tower, surrounded by her officers, Lali watched from a royal chair. The Caths were noisy.

The Mongs across the way were silent. They had formed a long, solid, dark line across the plain, before the camp of black tents. One of the tents had been moved forward. Before this tent, on a high throne and surrounded by banners, sat a crooked figure that Blade knew must be the Khad Tambur, Shaker of the Universe. Spies reported that he had a crooked back and lewd tastes, though impotent.

Blade rode his big gray horse to where a lance had been planted. A horsetail fluttered from it. He waited. Where was the Khad's champion?

As soon as the sun shot up there had been a brief conference with Homunculus, the same little warrior who had brought the challenge the day before. Details had been arranged. Blade found himself liking the little rascal again.

Just before he rode away the dwarf gave Blade a strange look, his dark eyes intent and serious above the grin, and said a strange thing.

"Beware the ground, Sir Blade."

Just that. Beware the ground. Blade puzzled briefly and then forgot it. It had been a warning, perhaps well meant, but a warning against what?

As he waited for the man he meant to kill, he surveyed the plain about him carefully. He saw nothing unusual. Just flat barren earth studded with small rocks here and there, patches of gravel, and the ever present black sand. He could see no hazard in the ground itself.

A rider left the ranks of the Mongs and came dashing toward him. Blade soothed the gray and pulled his head around as the rider began to veer off at an angle. Blade spun the mace over his head to loosen his shoulder muscles. The weapon had been made for him by Cath armorers as he supervised. It had a short wooden handle to which was attached a length of chain. At the end of the chain was an iron ball studded with razor sharp bits of jade. A fearsome weapon, and Blade knew how to use it.

He carried a square shield and a short sword. In his belt was the same dagger he had taken from Lali that first night. He had selected the gray horse from all the enormous stables behind the wall and had the animal armored with thick silken quilting.

The rider, yelling and whooping constantly, began to circle behind Blade. He quietly pulled the gray around to face the danger. If he could, he meant to make the Mong come to him.

The Mong warrior was in no hurry. He dashed within twenty yards of Blade and pulled his shaggy little horse into a rearing halt. He shook his lance at Blade.

"Yieeee - I am Cossa! Champion of all the Mongs. I come to slay you for my Khad." He had really come to study Blade and he did so now, the dark eyes missing nothing. He was a small man, but compact and muscular, with bushy hair and an enormous moustache. He wore a pointed leather cap and leather chest armor. Below the waist he was bare except for short breeches, and his thick legs were thrust into high boots of skin.

For a few breaths they exchanged glances, each weighing the other. Blade said, "Get on with it, then. Your Khad will be impatient."

The Mong set his horse to prancing. He reached for a short bow on his shoulder and fitted an arrow to it. Blade moved his shield into position and nudged the gray lightly with his spurs. Let the man get off his first shot, then charge him. The gray was big and powerful, the Mong horse a pigmy by comparison. At the first opportunity he meant to ride down the Mong and his horse, send them crashing to the earth. Once he had the Mong on foot the mace would do the rest.

The Mong yelled and loosed an arrow with a careless motion. Blade's shield was ready but the arrow came in low and zipped into the gray's quilted armor where it dangled harmlessly.

That was it. Trying to bring the gray down! Blade twitched the bridle and the gray began to move about a bit.

The Mong, still yelling threats, began to circle Blade. The man was a superb horseman. As he dashed past he leaned far over, so he was nearly invisible, and fired arrows from beneath the belly of his horse. One of the arrows nipped the gray just above a fetlock and the animal reared and whinnied. Blade calmed him and waited.

The Mong came back, riding upright, now between Blade and the Mong camp. He appeared puzzled as just how to come to grips with this big man who sat and watched him with such calm and contempt.

Blade rose in his stirrups and swung the mace over his head. He taunted the man. "You say your name is Cossa? What does that mean in Mong? Coward?"

The Mong wheeled his horse abruptly and rode away, back toward his own lines. Blade waited patiently.

The Mong came back at a gallop, now carrying a shield and brandishing a long lance. Beneath his helmet Blade smiled. This was more like it.

The Mong came straight at him, the lance poised. Blade moved the gray a little sideways, took the lance on his shield and swung the mace at the man's head. It was not there. The deadly iron ball whistled harmlessly just where the man's head had been. Then the Mong was away, his lance still intact, and circling to come back at Blade again. Blade wheeled to face this new attack, comforting the gray. This time his tactic would be a little different.

The Mong came driving in with a scream of defiance. The lance splintered on Blade's shield. Instead of trying to mace the man, he forced the gray directly into the smaller horse. There was a tremendous shock as both horses screamed and pawed at each other. The Mong horse was shaken; it stumbled but did not go down. Blade cursed softly.

The Mong fooled Blade. Instead of retreating he came in again, fast, thrusting at Blade with the splintered end of his lance. Blade shielded himself and before he could swing the mace, the man leaned over to slash at Blade with a curved sword. Blade missed with his mace again and warded off the sword stroke with his shield. He reached for the man with one big hand, trying to grab him and drag him off the little horse, but once again the Mong was not there. He broke clear and dashed away, sending back whoops of defiance. Blade was now covered with sweat beneath his wooden armor. Elusive was the word. The man and his horse were like quicksilver.

He decided to anticipate the next charge. He had been letting the Mong take the initiative and that was not working. He waited until the Mong swung around, near his own lines, and selected a new spear from a number jabbed into the ground. He took his time about it and Blade knew the man was thinking and catching his breath.

Blade talked to the gray and began to move him just a bit, slowly, picking up momentum. Then the Mong wheeled and came charging back.

Now! The Mong pulled his horse around, reared, yelled, and came at Blade again. Blade put the spurs to the gray and thundered forward straight at his attacker. With this much momentum, and squarely met, the little horse would have to go down.

The Mong realized the situation too late. Blade put the gray into a thundering gallop and met the enemy head on. The shock was terrible and Blade lurched in the saddle, but the gray rode the little horse down and sent it sprawling and kicking. There was a roar of joy from the wall. The long line of Mongs was silent.

Cossa the Mong was out of the saddle even before the horses met. He landed on his feet, running. Blade went after him, swinging the deadly mace. The man ran back toward his own lines, veered sharply to the left, and kept running. Blade, to cut him off, spurred very near the Mong lines and then cut back. No spear was thrown by the watching Mongs, no arrow loosed. They watched in silence.

Blade was unaware of them. His heart was thudding, he was bathed in sweat and the battle fever was on him. He wanted one thing and one thing only - to kill this elusive Mong. He tossed away his helmet so he could see better. The Mong had run back toward the wall. Fifty yards from Blade he stopped, jabbed his lance in the ground, and fell to one knee. He whipped the crooked little bow off his shoulder, notched an arrow and waited for Blade to attack. His horse, with a broken leg, was dragging itself off to one side.

The gray was trembling under him. Blade soothed the beast and considered. No longer was it so easy to ride the Mong down and mace him. The man had been fast enough to consolidate his position. If Blade charged him now the gray would almost certainly be killed by arrows.

Blade stroked the horse and the animal calmed somewhat. A fine beast, but that was not Blade's prime consideration. If the gray went down while charging, Blade would take a terrible fall and might well brain himself on any of the stones about. Even if he didn't he would be at a moment's disadvantage and he had seen how fast this Cossa was.

Blade rode nearer to where the Mong waited. There was no fear in the man, no surrender. He spat at Blade and called out.

"Why do you hesitate, Sir Blade. You have a horse and I have none. Why don't you come and kill me?"

"I will. I am only considering how best to do it."

Cossa laughed gutturally. Here was no sweet musical tone of the Caths. Harshly the man said, "Take your time, then. I am in no hurry to die."

Blade was close enough now to count the arrows in the Mong's quiver. Three left. It was worth the chance and it would look far better if he killed the man on foot instead of riding him down. Prestige might count in later dealings with the Khad. Blade swung down off the gray. He patted the animal on the rump and the gray went skittering away, to stop after a few feet and begin tugging at some sparse grass that thrust out of gravel.

Blade swung the mace and advanced on the Mong. They were down to the bone of it now.

Cossa waited until Blade was within twenty feet before he shot his first arrow. The aim was deadly - at the man's throat just above the armor. Zzzzz - thuck.

Blade pulled the arrow from his shield and tossed it to one side. "Two arrows left, Cossa."

"One will be enough, Sir Blade."

Blade moved in cautiously, lightly, the shield held ready for sudden defense, the cruel mace swinging at his side.

"At least you are a man," said Cossa the Mong. "You give up your advantage and fight me on foot. No true Cath would have done that." Blade moved closer.

"You do not look like a Cath," said the Mong. "You are dark and you have a beard. What are you doing with those overcivilized fools? You should be with us, stranger.