The rest in the Observation Ring lasted far longer than Leylin had originally budgeted for.
He didn't force a move. He stood in the quiet of the grand, stone hall, watching his soldiers with cold, pragmatic detachment. The force was battered. They were disciplined, brave, and exceptionally dangerous, but their actual physical register—the subtle hitch in Yaala's stride, the slight tremor in Rhonin's casting hand, the grey exhaustion dusting Muradin's brow—was further from combat-readiness than his baseline model had assumed.
So he let the clock run.
Pushing into the upper sanctum's under-rest was a mathematical error. The Titan-forged Keepers had been sitting in Ulduar for ten thousand years; an extra two hours wouldn't change what they were. It would, however, radically alter what his army was when it crossed their thresholds.
While the soldiers slept on the polished stone, Brann Bronzebeard did not.
Brann's relationship with sleep in field environments of high archaeological value had always been a distant, purely theoretical concept. He spent the lull pacing the perimeter of the Observation Ring, his brass goggles pushed up onto his forehead, devouring the high-tier inscriptions. He worked with a stripped-down, intense efficiency, hastily scribbling translation notes onto a thick roll of parchment, cross-referencing Titan notation styles he had spent three decades trying to decode.
By the rest period's midpoint, he rolled up the parchment, walked over to where Leylin stood near the golden light of the central teleporter pad, and spread his notes across a flat stone altar.
"The Keepers," Brann said softly. His voice lacked its usual bombastic flare, stripped back to a rare, serious gravel. "Four of them. The ring's archival tablets describe their original functions, their command frequencies, and... what the shadow did to them when the prison's inner locks failed."
Leylin looked down at the dense, hand-drawn schematics and translation columns. "Show me."
When the strike force finally assembled around the humming teleporter pads, refreshed and armed, Leylin stepped to the center. Brann stood at his right shoulder—a quiet, deliberate pairing of Brann's historical context and Leylin's tactical execution.
"Pay attention," Leylin said, his voice carrying easily over the low hum of the Titan machinery. "We are stepping out of the automated defense grid. What lies above are not constructs."
He nodded to Brann.
"The Keepers of Ulduar are Titan-forged," Brann began, stepping forward and using his stylus to point at a rough sketch of a massive, armored figure. "That isn't just a title. Constructs are forged machinery—tools built for a job. The Keepers are something the Creators made that sits somewhere between high engineering and living demigods. They were given distinct, individual personalities and sovereign authority over Azeroth's elemental and biological architecture. They don't just run their domains. They are their domains."
Brann looked over at Muradin, who was listening with grim, unblinking focus.
"Which brings us to the nature of their corruption," Brann continued. "When Yogg-Saron took the constructs in the outer ring, it inverted their programming. It made the Flame Leviathan attack invaders instead of defending the gates. But the Keepers couldn't be reprogrammed like simple machines. The Old God had to rewrite their character. It didn't take away their power; it reached into who they were, found their fundamental traits, and twisted their purpose from the inside out."
A cold, uncomfortable quiet settled over the assembled commanders.
"First: Freya," Brann said, pointing to the northern quadrant of his map. "The Keeper of Life. She was charged with maintaining the delicate interface between Ulduar's artificial systems and the living biosphere of Northrend—her domain connects directly to the Emerald Dream. The shadow reached her through that very connection. The life-force she channels is no longer pure; it is warped, overgrown, and violently aggressive."
Brann paused, clearing his throat. "She is supported by three ancient treants—Elder Brightleaf, Elder Stonebark, and Elder Ironbranch. They represent the oldest growth of the world's primeval forests. In her baseline state, she can be fought individually. But the difficulty rises... all three Elders remain active in her conservatory. They don't just fight beside her; their proximity exponentially amplifies her magical regeneration and physical damage."
Alleria Windrunner stood near the front, her bow resting loosely in her grip. Her green eyes narrowed as she absorbed the description of a corrupted wild-god.
"She isn't choosing to fight us," Alleria stated softly. It wasn't a question.
Brann looked at her with a scholar's quiet sadness. "No. The tablets indicate the Keepers' core architecture actively resists corruption, but their fundamental nature works against them. Freya's profound love for living things was the exact door the Old God used to drag her down. The deeper her connection was to Azeroth, the deeper the shadow could reach."
Alleria nodded once, her jaw tightening. "We purge the shadow, then. Or we give her peace."
"Second: Hodir," Brann said, moving his stylus to the eastern quadrant. "The Keeper of Winter. He controlled the localized climate engines of the Storm Peaks. In his original state, he regulated the frost to preserve the ancient structures. The corruption took his restraint away. It turned his control over absolute zero into an indiscriminate, freezing tempest."
Brann's brow furrowed as he read his own notes. "The inscriptions mention something strange about Hodir. He is currently encased in a massive, self-generated glacier. The texts suggest he froze himself—an instinctual, desperate attempt to lock his physical body away before the Old God could fully command his movements. But the shadow has adapted. It is using his frozen form as an ambient cold-nuke."
He looked up at the frontline commanders. "To engage him, we have to break that glacial tomb within a strict time window. Trapped inside with him are his original frost-dwarf priestesses and frost giants—the Sons of Hodir. Freeing those allies during the encounter is mandatory; their elemental buffs are the only way our casters can survive the flash-freezing atmosphere."
Thrall stood quietly near the rear, his hands resting on the leather wraps of Doomhammer. His connection to the elemental spirits gave him a visceral, terrifying understanding of what a corrupted god of winter meant. He said nothing, but his jaw set into hard stone.
"Third," Brann said, and his voice hitched slightly, a mix of profound awe and deep dread. "Mimiron."
Muradin made a strange, low sound in his throat—a mixture of a whistle and a grunt. "The architect."
"The Master Engineer of the Creators," Brann confirmed, his eyes shining behind his goggles. "He built the Flame Leviathan. He built the XT-002 Deconstructor. He built Ignis's forge, and he laid the mechanical foundations for the entire Mechagnome civilization. Every gnomish gear, every dwarven forge-line, every goblin engine on this planet traces its theoretical roots back to the mind of Mimiron."
Brann leaned over his notes, his voice dropping. "The shadow reached Mimiron through his curiosity. His defining trait was an unquenchable, obsessive desire to see how things worked—to push engineering past its theoretical limits. Yogg-Saron didn't break his mind. It simply gave him a new, twisted set of research parameters. Mimiron doesn't see us as an invading army. He sees us as a fascinating, highly complex stress-test for his latest war-machines."
"He thinks we're lab rats," Jaina said quietly.
"He thinks everything is an experiment," Brann corrected grimly. "And his workshop is fitted with a specific red button—a manual override designed to disable all safety limiters on his inventions to test their maximum theoretical output."
"Hard mode," Leylin said flatly.
"Hard mode," Brann agreed. "If we hit that button, his self-destruct sequence initiates, doubling the speed and damage of every mechanical death-trap in his arena."
Muradin ran a hand down his thick beard, a dry, bitter laugh escaping his lips. "A mad god of engineering. Lovely. Just lovely."
"And finally," Brann said, turning to the last quadrant. "Thorim. The Lord of Thunder."
"Storm and sky," Thrall muttered, his voice rumbling like distant thunder.
"Aye," Brann said softly. "Thorim's domain was the sky over Northrend. But unlike the others, Thorim's corruption didn't begin with a magical breach. It began with grief. Long before Yogg-Saron took Ulduar, a tragedy shattered Thorim's mind—the loss of his mate, Sif. He withdrew into a deep, hopeless depression, abandoning his duty. And it was in that dark, hollow void of grief that the Old God found him."
Brann looked up, his eyes grave. "Thorim's fight is personal. He isn't a machine following an altered program; he is a broken, furious god who believes he has nothing left to lose. He will fight us with every ounce of thunder left in his veins, because in his mind, the violence is the only thing that distracts him from the pain."
"A broken heart in a tempest," Vindicator Yaala murmured, touching her crystal broadsword. "He will strike without mercy."
"He will fight until we force him to see what he has become," Leylin said, cutting through the heavy emotion settling over the ranks.
He stepped to the center of the teleporter pad, his mask gleaming under the golden light as he looked over his assembled leaders.
"Four Keepers," Leylin said, his voice crisp, analytical, and absolute. "Four completely distinct operational problems. We do not split our forces. We do not engage them in parallel. We move as a single, overwhelming unit, taking them down one by one."
"What is the sequence?" Rhonin asked, his staff humming as he prepared his combat wards.
"Freya first," Leylin ordered. "Her domain connects to the ambient life-force of the mountain. Removing her severs the Old God's primary biological feedback loop. Then Hodir, to collapse the freezing aura in the upper halls. Then Thorim. And we save Mimiron for last—because his workshop will require every ounce of focus, mana, and blood we have left."
He looked over at Brann.
The dwarf explorer stood taller, his pack strapped tight, his brass goggles pulled down over his eyes. He didn't look like a nervous scholar anymore; he looked like a Bronzebeard ready to face the gods of his ancestors.
"Are you ready, Brann?" Leylin asked.
Brann looked at his brother Muradin, who gave him a firm, rough clap on the shoulder, then turned to Leylin with a fierce, resolute nod.
"I've been preparing for this my entire life, lad," Brann said, his voice ringing with dwarven steel. "Let's go meet the Creators."
Leylin raised his hand, signaling the strike force. Leylin commanded. "We go up."