As the Naaru's Seven-Star Array continued to function, the entire prison chamber was bathed in an increasingly intense Holy Light!
Even the edges of the pool of Saronite were beginning to shimmer with golden traces, a testament to the Light's encroaching power!
Within the small lake formed by the gathering of the eerie green liquid metal, Yogg-Saron thrashed desperately, channeling its dark power in a frantic attempt to reclaim the prison and restore it to its original chaotic state!
The Old God emitted ear-piercing soul-screams, causing the five Titan Watchers, including Galen, to wince in pain.
Thorim unleashed a storm of lightning to protect himself, Hodir encased himself in a shell of ice, weathering a barrage of tentacle strikes, and Archaedas petrified his entire body, becoming a living statue!
Freya, the Life-Binder, drawing upon her vast reserves of life energy, channeled a wide-area healing spell, akin to the druidic Tranquility, at the edge of the Saronite pool, attempting to counteract the Old God's corruption!
But the most dazzling display came from Mimiron, who summoned his War Golem from some hidden workshop!
The War Golem was a sight to behold: a bronze-colored behemoth with a rounded head, two glowing blue hexagonal eyes, and a lower body that resembled a scaled-down version of the Flame Leviathan. (It was unclear just how many of these machines Mimiron had actually constructed!)
The Golem's torso was a massive sphere, with an octagonal glass viewport on its chest. At this moment, Mimiron was skillfully operating the machine's articulated five-fingered mechanical arms, tearing the bone-like tentacles from the ground with astonishing strength, as if pulling weeds!
Even the Naaru were feeling the strain. Besides A'dal and M'uru, the energy forms of the other five members of the Seven-Star Array pulsed with a faint tremor, their light flickering slightly!
Seeing that its desperate resistance was having some effect, Yogg-Saron redoubled its efforts. The frantically dancing black tentacles slammed against the ground with renewed ferocity, causing the entire Ulduar to shudder violently!
Galen, however, saw Yogg-Saron's panic for what it was: a sign of desperation. The sanctified environment created by the Naaru was posing a direct threat to the Old God's existence!
The more violently Yogg-Saron thrashed, the clearer it became that it was losing its grip on the prison!
Galen seized the moment. Wielding the Ashbringer, still stained with the ichor of the Old God's minions, he channeled the blade's full power, unleashing Ashbringer Awakening to sever the remaining tentacles that blocked his path. Then, he gathered the Holy Light within him, preparing his most devastating attack!
"JUDGMENT!" Galen roared.
A colossal golden greatsword of pure Holy Light materialized in mid-air, and with a thunderous momentum, it plunged downwards!
BOOM!
Yogg-Saron shrieked in agony as Galen's attack cleaved through its monstrous form, severing nearly a third of its mass!
"ROAR! You insignificant mortal! I will tear your soul from your flesh!" Yogg-Saron bellowed, its voice a chorus of pain and fury.
Enraged, the Old God unleashed another torrent of void energy, attempting to overwhelm Galen with soul-shattering attacks!
But the corrupting whispers that had driven even the Titan Watchers to madness, and the nightmarish visions of loved ones that had shattered their resolve, had no effect on Galen!
Yogg-Saron seemed to finally understand: this human was somehow immune to its most potent form of attack!
"No! This... this is impossible!" the Old God wailed.
If its calculations were correct, this human was the antithesis of the Old Gods!
Not only Yogg-Saron, but also the other Old Gods, including N'Zoth and C'Thun, were vulnerable to his Light!
If this human could replicate this alliance, wielding the power of order from the Naaru to counteract their chaotic void, they would be reduced to helpless prey!
Driven by a desperate need to survive, Yogg-Saron unleashed its final, desperate gambit. It had secretly prepared its escape plan for tens of thousands of years, and even now, on the brink of defeat, it refused to surrender!
The countless orifices that covered Yogg-Saron's main body, resembling grotesque "eyes," opened simultaneously, revealing the horrors within. They were mouths, each one filled with rows upon rows of razor-sharp, spiraling teeth, writhing tongues, and seemingly bottomless throats!
The Beast of a Thousand Mouths!
It was a truly disgusting sight!
But Galen's gaze was drawn to a strange organ within Yogg-Saron's largest maw.
Could that be... the core of this Old God?
Looking down at the pool of Saronite, where the encroaching gold and green were locked in a stalemate just a few meters from Yogg-Saron's writhing form, Galen steeled his resolve!
He retrieved the Rebirth Cross, his last-ditch defense, and clenched it tightly in his teeth!
His Divine Shield had been exhausted, leaving him vulnerable. For the next few precious moments, he would rely on the Invulnerability Potion to survive. He prayed that, as with Archimonde, he wouldn't have to activate the cross.
Seeing his opportunity, Galen gripped the Ashbringer and leaped high into the air, plunging directly into Yogg-Saron's gaping maw!
"Hahaha! You foolish mortal! You have sealed your own doom!" Yogg-Saron roared, its voice a triumphant, yet desperate, shriek.
The Old God's massive mouth snapped shut, swallowing Galen whole!
But Yogg-Saron failed to notice Galen downing the shimmering pink potion just before his descent.
The moment Galen entered Yogg-Saron's body, he was engulfed in a torrent of vile, corrosive fluids!
White smoke billowed from Galen's form, the Invulnerability Potion barely holding back the tide of acidic corruption!
Without its protection, Galen would have been dissolved instantly within the Beast of a Thousand Mouths!
Seizing his brief window of opportunity, Galen unleashed the full power of the Ashbringer, driving the blade deep into Yogg-Saron's pulsating flesh, directly into what he suspected was the Old God's core!
"AAAAAGH!"
Yogg-Saron screamed, the sound echoing through the prison in a cacophony of agony and despair!
Outside, the Guardians and Naaru witnessed a blinding eruption of pure Holy Light from within Yogg-Saron's body. The light tore through the Old God's grotesque form, piercing its flesh like a thousand divine spears!
BOOM!
Taking advantage of Yogg-Saron's moment of vulnerability, A'dal led the Naaru in a final, overwhelming surge of Holy Light!
With Yogg-Saron's resistance shattered, the remaining green Saronite was instantly transformed into golden, purified liquid!
Yogg-Saron's monstrous body writhed and convulsed within the golden pool, but its struggles only hastened its demise!
CRACK!
A sickening sound echoed through the chamber as Galen, his Holy Light wings flared, burst free from Yogg-Saron's body, emerging amidst a shower of dark blood and ichor!
Yogg-Saron let out a final, furious roar!
Its death throes caused the remaining tentacles to lash out in a desperate, chaotic frenzy, but the tentacles quickly dissolved in the purifying Holy Light!
Tentacles, main body... soon, Yogg-Saron's entire form vanished, consumed by the Light!
"Detected a collectible soul. Do you wish to collect it?" a voice echoed in Galen's mind.
"Collect!" Galen commanded, his body slumping to the ground with a heavy thud!
Galen was not alone in his exhaustion. The Titan Watchers also breathed a collective sigh of relief, their bodies and minds drained by the arduous battle. Mimiron's War Golem, heavily damaged by Yogg-Saron's final, desperate counterattack, lay in pieces, and the Creation King wore a look of utter exhaustion.
The Naaru, however, did not falter. They continued to channel their Light, ensuring the complete and utter vanquishment of the Old God's corruption.
This, Galen mused, was the true definition of professionalism.