The most widespread myths whisper that the nymph Thetis plunged her son into the shadowy waters of the river Styx, making him invulnerable to all harm except at the heel by which she held him as she submerged him in the current of the underworld.
But if one attends to the verses of the Iliad, one will find that what distinguishes Achilles is not an impossible-to-wound skin, but his lightning speed and his genius for war. It is not invulnerability that makes him fearsome, but his fury, his precision, his murderous art.
That supposed immunity was, in truth, a later interpretation, born in Hellenistic and Roman times, when the memory of events turned into legend and legend into dogma. After more than ten years of war before the walls of Troy, no enemy managed to wound him. Neither spears in tight formation, nor arrows loosed in clouds, nor the assault of entire armies could even brush against him.
Only an arrow guided by Apollo found its mark.
A bright red thread slid between Achilles' fingers, tracing a crimson trail down his cheek before dripping and losing itself in the burning sand.
The stands fell suddenly silent, as if the very air held its breath, unable to comprehend what had just occurred: something that seemed impossible.
Suddenly, the silence broke into a deafening roar. The crowd erupted in a unanimous shout, acclaiming the feat that Diomedes had just accomplished.
Among the stands, beside his Achaean companions, Patroclus watched the scene with his face darkened by concern.
In the divine box, Thetis, the mother of Achilles, brought both hands to her mouth in an instinctive gesture of horror and shock, her eyes fixed on the scene.
At the other end of the box, Hephaestus, the smith of the gods, let out a satisfied smile he could not quite conceal.
"Satisfied?" Athena asked the god, a half-smile curving her lips.
"A little, yes" Hephaestus replied, unable to fully contain the amusement that shone in his gaze.
Achilles slowly pulled his hand away from his right eye. The crimson blood dripped between his fingers, staining his palm like fresh paint upon bronze. And yet, he smiled. A crooked smile, almost amused, as if the pain reminded him that he was still alive.
Then he felt it: a subtle whistle in the wind, a change in the air that no ordinary mortal would have perceived. His instinct screamed danger. He leapt backward with feline grace.
Diomedes had not wasted a single heartbeat. The short sword left his hand in a perfect spin, not only rotating on its axis like a ravenous saw, but curving its trajectory through the air with impossible precision. He had thrown the weapon so that it changed direction mid-flight, deceiving both eye and instinct. The blade came whistling from
Achilles' right flank.
The Pelid reacted a moment too late. Barely. The tip of the sword sheared off several locks of his golden hair, which floated for a second in the air before falling. That was more than entire armies had managed in years of siege.
Diomedes saw it. He knew it. Achilles, the invincible, had hesitated. For thousandths of a second, but he had hesitated.
He gave him no time to recover. He charged at full speed, a whirlwind of bronze and determination. When he stood before him, he unleashed a descending diagonal cut from the Pelid's left shoulder, a slash that would have split any other man in two. Achilles dodged it with a minimal twist of the torso, the fluid motion of one born for war.
But Diomedes was not finished.
At the end of the descent, without pause, he reversed the motion. The sword rose in an ascending arc, now from the right, straight toward the exposed neck. Achilles stepped back, but again… late. Barely. The blade grazed the skin beneath his jaw, leaving a bright red thread that beaded like drops of crimson dew.
Diomedes stepped back one pace, his eyes fixed on that thin line of blood. He had confirmed his hypothesis.
In the divine box, Athena watched with her arms crossed and her gaze sharp as a spear.
"What is happening?" Hephaestus asked, leaning toward her with a furrowed brow. "Why are you smiling like that?"
Athena did not take her eyes off the field.
"Diomedes was prepared" she replied, her voice low but heavy with satisfaction. "That cut he launched while the cloud of dust concealed them was not only meant to kill Achilles. He aimed for the eyes. If the killing blow failed, the damage would remain regardless. The Pelid's sight would pay the price."
She paused, and her smile widened slightly, proud.
"He has created a blind spot in Achilles."
Back in the arena, the dust still floated like a dense fog, heavy with the smell of blood and overheated metal.
Diomedes did not grant even a second of respite. With a quick twist of the wrist, his sword cut the ground and sent a burst of fine sand straight toward the left side of Achilles' face, blinding his still-good side.
Achilles blinked instinctively, the sand stinging him like needles. That instant of distraction was all Diomedes needed.
Without taking a step back, he advanced with a low, swift thrust aimed at Achilles' light feet. The tip of the sword whistled toward the Pelid's ankles.
Achilles reacted by pure instinct: he propelled his body backward in a short leap, the heel barely brushing the blade. But Diomedes had already anticipated the retreat. He closed the distance in a blink and unleashed a right hook straight to the exposed face.
The fist struck with a dry crack. Achilles' head jerked to one side. Stunned for a fraction of a second, enough for the world to tilt, he barely saw the next blow coming: an upward hook aimed at his jaw.
The Pelid tilted his head at the last instant. Diomedes' fist grazed his cheek, leaving a burning trail and the echo of a whistle. Before he could straighten, Diomedes stepped forward and slammed his right forearm into his chest. The blow was like the ram of a galley: Achilles flew backward, his feet dragging furrows through the sand, and landed on his knees with a choked gasp.
He raised his gaze, the good eye shining with restrained fury. Diomedes was already running toward him, sword raised high. The descending slash came with the full strength of his arm and the weight of his body.
But it cut only air and dust.
Achilles had vanished. A golden flash, a blur of divine speed, and the Pelid reappeared behind his enemy like a lightning bolt that falls without warning. The long spear was already in position, the sharpened tip aimed straight at the back of Diomedes' neck.
"Goodbye… Diomedes" whispered Achilles, his voice cold as freshly forged iron.
The thrust came clean, precise, deadly.
Diomedes barely had time to tilt his head a centimeter to the right. On any other day, with Achilles at his full strength, that movement would have been useless. But today the Pelid's right eye was a crimson blur; his perfect perception had fractured. The tip of the spear grazed Diomedes' neck, leaving a bright red thread that beaded upon the skin, but no more.
«Did I miss?» The thought shot through Achilles' mind like a bolt of disbelief.
He had no time to process it.
Diomedes snapped his head backward with violence, smashing the back of his skull into the Pelid's nose. The impact rang out like a hammer on an anvil; Achilles staggered two steps back, fresh blood pouring from his nostrils, his eyes watering from the sudden pain.
Time seemed to freeze.
Diomedes spun around in a fluid motion, the world reduced to a tunnel: only him, Achilles, and the opening he had just created. There would be no other chance like this. He knew it in his bones.
With a restrained roar, he drove the short sword into the Pelid's belly.
The blade went in clean, piercing muscle and bronze with a wet, dull sound. Achilles let out a choked gasp; his eyes —the good one and the wounded one— opened wide. The spear slipped from his fingers and fell to the sand with a muted clang.