The moment Illidan confirmed Arthas's actual position on the glacier, every strategic calculation he had labored over since abandoning the shattered plains of Outland required immediate, violent revision.
He did not abandon his fundamental objective. The destruction of the Frozen Throne remained an ironclad necessity—the singular anchor of his current existence, promising liberation from his demonic master, Kil'jaeden, while its failure threatened a damnation too absolute to contemplate.
He had planned for a conventional, surface-bound adversary. He had thoroughly mapped, fortified, and locked down the visible pathways of Icecrown. He had not, however, allocated sufficient resources or imagination to the possibility of Arthas emerging like a phantom from the eastern threshold of Azjol-Nerub.
By bypassing the resource-intensive blockade his vanguard had maintained for days, the Death Knight had transformed a well-constructed siege into a desperate scramble. This tactical error unfolded with the unforgiving arithmetic unique to subterranean shortcuts, presenting a fatal disadvantage at the precise moment Illidan's army could least afford to absorb it.
Descending alone on the icy peak, Illidan monitored the shifting tides of his army through the unique, multi-layered perception granted by his demonic transformation. His spectral sight bypassed the blinding white sheets of the blizzard, filtering the battlefield into raw, swirling vortexes of energy.
The tactical situation possessed a rigid, terrifying anatomy that his analytical mind kept returning to, much like a master architect inspecting a load-bearing pillar that was beginning to crack under a vault.
The Scourge enjoyed a fundamental exemption from the rules of war. They were free from the accumulated psychological and physiological degradation that sustained, high-intensity combat inflicted upon breathing mortals.
A ghoul did not suffer from lactic acid buildup; a crypt lord did not experience the erosion of morale when the soldier to its left was hacked into kindling. The Scourge could bleed their numbers into the snow indefinitely, paying for inches with lives they could instantly replace through the necromantic saturation of the soil.
To complicate matters, the ancient glacier itself seemed hostile to his forces. The sub-zero temperatures stiffened the fingers of his archers and froze the sea-water armor of his naga, demanding a continuous, exhausting expenditure of physical energy merely to exist on the field.
He was caught in a race against a compounding interest rate of blood. He had to kill the brain before the limbs choked him to death.
Illidan descended from his high vantage point, plunging directly into the chaotic matrix of the lower valleys. He did not move like a general joining his men to offer comfort; he passed through the ranks like a force of nature heading toward a specific point of impact.
Around him, the battlefield was a visual symphony of violence. Naga myrmidons were locking shields against a wall of shambling abominations, their heavy tridents shearing through rotted sinew while the icy ground beneath them grew slick with green ichor and dark blood.
The soldiers recognized the towering, winged silhouette of their master as he tore through their lines. They instinctively pulled back, clearing paths through the drifts to give him the operational space his immense agility required.
He issued no grand speeches. Where a flank was crumbling, he unleashed a localized burst of emerald fire to vaporize the immediate threat, and then he kept moving, the white curtains of the blizzard closing behind him like water behind a stone.
Arthas was closer now. Through his spectral vision, Illidan could feel the unmistakable aura of the prince—the dense, localized knot of sub-zero vacuum that accompanied Frostmourne wherever it went.
The runeblade's presence was sharpening, its unholy frequency vibrating through Illidan's horns as the distance between them closed to less than two miles.
Just as he had calculated, Arthas was moving with the single-minded momentum of a machine, carving a straight, bloody trench through the eastern flatlands, driving his forces toward the base of the Citadel with a complete indifference to his own casualties.
Illidan accelerated his pace, his hooves leaving scorched, black patches in the snow.
Behind him, Vashj's consolidation was proceeding with a brutal, admirable efficiency.
Even over the deafening roar of the storm, he could hear the piercing resonance of her command sirens echoing through the canyons, pulling the mobile divisions back from the periphery, weaving them into a dense, interlocking shield around the citadel's approach.
She was executing a masterful tactical triage—abandoning minor ridges, sacrificing small rear-guard units to the pursuing ghouls, and funneling every significant weapon into a single, desperate choke point.
It was a magnificent effort, but Illidan knew the grim calculus: it still would not be enough to hold for long. It was simply the only asset he had left to spend.
The primary approach to the Frozen Throne finally materialized through the blinding squall. It was not a welcoming gate, but a monolithic, saronite amphitheater flanked by colossal obelisks that channeled the raw ley-energies of Northrend straight into the peak.
The air here was so thick with the Lich King's decaying psychic authority that it felt heavy, almost oily against the skin.
The throne's power, fractured and hemorrhaging as it was, saturated the immediate geography with an intensity that Illidan's altered perception registered as a physical ache. It was a rhythmic, agonizing throb that bypassed his intellect entirely, vibrating through his bones like the deep bass of a funeral bell.
Ner'zhul was up there, trapped within his shell of enchanted ice, screaming into the void for a savior. And between Illidan and that dying god stood the prince.
The distance vanished. The blizzard parted one final time, and there, at the opposite end of the snow-covered courtyard, stood Arthas Menethil.
The Death Knight halted. His platemail was caked in dried gore and grey dust from the deep kingdom, his tattered cloak frozen stiff by the wind.
He raised his head, his pale face completely devoid of human warmth, his eyes twin pinpricks of unholy blue fire glowing behind his heavy visor. He adjusted his grip on the hilt of Frostmourne, the blade clearing the snow with a soft, ominous hiss as its runes flared into a brilliant, predatory violet.
The battle still raged along the outer ridges. Miles away, naga and orcs were dying in the drifts, their sacrifices buying the exact number of minutes required to bring these two blades into the same circle of ice. The arithmetic of the campaign had reached its final page.
Illidan drew his twin warglaives from his back, the massive, curved blades erupting in a violent shroud of emerald fel fire that hissed furiously as it met the sub-zero air. He spread his great, leathery wings, his chest heaving as he absorbed the raw, unholy presence of his rival.
There was no need for words. They had spoken at Felwood; they had parsed each other's souls through the language of steel.
They both knew that whoever left this glacier alive would inherit the future of the world, and whoever fell would be erased from its ledger entirely.
The glacier groaned beneath them, a deep, tectonic rumble as if the land itself was settling in to watch the end.
Illidan locked his sight onto the prince's throat, crouched low into the snow, and ignited his propulsion. He charged.
South of the clashing titans, shrouded by the colossal, pale ribcage of the Dragonblight, Leylin's unit stood in absolute, disciplined silence.
Leylin walked to the mouth of the bone cavern, his eyes scanning the northern horizon where the distant sky was bruised a deep, unnatural violet by the magical fallout.
"Move out, we need to arrive in the battlefield faster." Leylin told everyone within the unit. Because if Leylin arrived too late, Arthas would already be in his march towards the Frozen Throne. Stopping him at that point would be unrealistic.
As they continued onwards north, he could just transform into his flight form to arrive quickly but that would mean leaving the unit behind. If he did that, the battlefield could be changed but Leylin didn't want anything unexpected happening. Because here in Northrend, its not only the Lich King who are his enemies.
There are some minions of the Old Gods hidden behind this continent. Even Arthas faced some of the Faceless Ones in Azjol-Nerub. Leylin didn't dare gamble the lives of everyone else. As he kept his thoughts, his hands rested calmly on his utility belt, his expression a study in pristine, professional detachment. The landscape had executed his strategy perfectly.
The two most dangerous entities on Azeroth were currently locked in a mutual assassination attempt, expending the priceless resources of their respective empires for a prize that only one could claim.
The strike team moved with the flawless, silent synchronization of an executioner's blade being drawn from velvet. The information had been harvested; the mathematics of the collapse had been thoroughly calculated.
While the two desperate kings tore the glacier apart in their race for a frozen throne, the true masters of the northern theater stepped out into the wind, moving toward the carcass of an empire.