Chapter 9 - The Sunken Cathedral

The shockwave of decay hit the edge of the Obsidian Plain with the force of a hurricane. Where the green light touched, stone withered into grey dust, and the ambient light in the air died instantly. Commoners and guards alike scattered in absolute terror, running into the narrow, winding alleys of the city to escape the encroaching darkness.
"Retreat to the Lower Gates!" Kael yelled to the surviving rebels, dragging Elara back toward the obelisk, where the blue-white aura provided a small sanctuary against Malakor's corruption. "Get everyone out of the square!"
"No," Elara breathed, standing her ground despite her trembling limbs. The Crown’s light was flickering, fighting against the suffocating pressure of the green aura. "If Malakor fully corrupts the Heart, the alignment will shatter. The entire city will collapse into the Whispers."
"We can't fight him head-on!" Kael argued, pointing his light-blade toward the Cathedral steps, where Malakor now stood surrounded by a wall of swirling, green mist. "He’s tapping into the necrotic core beneath the aqueducts. My blade won't even scratch that corruption!"
"Then we don't hit him from the front," Elara said, her eyes darkening with resolve. "We go under."
She grabbed Kael’s hand and pulled him toward the massive fissure at the base of the Founder’s Obelisk—the very rift she had opened hours earlier. Without waiting for his agreement, she leaped into the abyss.
Kael swore loudly under his breath and jumped after her.
They fell through three hundred feet of screaming darkness, surrounded by the rush of damp, ancient air. Just before they hit the jagged rocks of the subterranean cavern, Elara expanded her consciousness, calling to the dormant slime of the Whispers. A cushion of thick, bioluminescent fluid rose up to catch them, absorbing their momentum with a wet, heavy thud.
They surfaced in the Sunken Cathedral—a vast, forgotten underground complex directly beneath the city’s foundations. Massive pillars of carved basalt held up a ceiling that echoed with the distant, muffled sound of the chaos above. The air here was thick with the smell of wet sulfur and old blood.
"This place..." Kael whispered, wiping the glowing green slime from his face as he helped her out of the basin. "It’s not in any map of the sewers. It’s too old."
"It’s where they sacrificed the architects," Elara said softly, her voice guided by the memories flowing from the Crown. She walked toward the center of the chamber, where a massive stone table was covered in ancient, dried stains. "When the Founders finished the Obelisk, they realized the energy was too wild to be controlled by one person. So they betrayed the very men who built it, using their blood to seal the Heart."
"And Malakor is using that old blood to unlock it," Kael said, stepping up beside her, his weapon raised.
From the darkness beyond the stone table, a low, wet breathing sound echoed.
Figures began to step out from behind the basalt pillars. They were not the Hollows of the upper sewers; these were the First Guardians—the ancient architects themselves, their bodies mutated into towering horrors of bone, rock, and calcified blood. Their faces were smooth, featureless masks of white stone, and their arms had been replaced with massive, jagged blades of rusted iron.
"They won't let us pass," Kael said, taking a defensive stance. "Elara, whatever you’re going to do with the Crown, do it fast."
There were six of the giant horrors, and they moved with terrifying, unnatural speed, their stone joints shrieking in the damp silence.
Kael engaged the first two, his light-blade flashing in brilliant arcs, cutting through the calcified armor of the creatures. But every time a limb was severed, the black slime of the cavern floor instantly reattached it, making them virtually immortal within their domain.
Elara walked straight past the melee, her eyes fixed on the far end of the chamber, where a massive vertical shaft stretched all the way up to the High Cathedral. At the top of the shaft, she could see the bottom of the iron orb Malakor held, glowing with its toxic green light.
"You built this city to endure!" Elara called out to the void of the cavern, her voice striking the stone pillars like a hammer on a bell. "You were betrayed by your peers, but your work was meant for all of us! Hear me, Architects of Celestia!"
She reached up and unclasped the Crown from her head.
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"Elara! What are you doing?!" Kael screamed as a stone blade grazed his shoulder, drawing a line of bright crimson blood. "Don't take it off!"
Elara didn't answer. She took the Crown—the mind of the city—and slammed it directly onto the ancient stone table of sacrifice.