The stairs beneath Highmere went deeper than the ones at Mount Cape.
Blue crystal veins in the walls glowed with a weaker light, as if the old wards had been strained for a long time. The air grew colder with every turn. Moisture beaded on the stone. Somewhere far below a low, steady pulse moved through the rock like a heartbeat that did not belong to the mountain.
Captain Rena led them as far as the first sealed door, then stopped. "Beyond this point the wards no longer answer to us. My men who tried to force the door last week never returned. I will hold the upper levels. Whatever is down there is yours to face."
She left them with a small lantern and a map that ended at the sealed door.
Sekai pressed a hand to the heavy stone. The surface felt wrong, slightly warm despite the cold air. Fury examined the remaining elven script around the frame.
"This seal was meant to last centuries," she said. "Something on the other side has been eating it from within."
Leafa drew her sword. "Then we open it on our terms."
Sekai already had a better idea. He pressed the pause button.
The world froze. He spent a careful stretch of stopped time studying the door, the hinges, and the way the black veins of corruption had spread through the stone. Ordinary force would only break the remaining wards and release whatever waited on the other side in an uncontrolled surge. He needed the door open without shattering the last protections.
He returned to the frozen party, borrowed Leafa's sword, and used the holy edge to cut the corrupted sections free one thin layer at a time. When the worst of the darkness had been cleared from the frame, he forced the door open just wide enough for them to pass, then positioned everyone in a tight formation on the threshold. Only then did he release time.
The door swung inward with a low grinding sound. Cold air rolled out, carrying the same metallic scent they had smelled in the Mount Cape labyrinth. Beyond the doorway a wide corridor of black stone stretched into darkness. The blue crystal veins here were almost completely swallowed by pulsing black growths.
Niña wrinkled her nose. "I already hate this place."
They moved forward.
The first chamber opened into a circular room lined with broken statues. Most of the figures had once been elven, but the faces had been melted and reshaped into screaming mouths. Black vines crawled across the floor in slow, searching patterns. In the center of the room a shallow pool of liquid shadow reflected no light at all.
Fury stopped at the edge of the pool. "This is a feeding point. The darkness above is being drawn down here and concentrated."
Before anyone could answer, the vines moved.
They struck as a single coordinated wave, lashing toward every member of the party at once. Sekai pressed the pause button before the first vine could close around an ankle.
In the frozen silence he walked the room and cut every major vine at its root with Leafa's sword. He cleared a safe path through the center, dragged the worst of the black growth away from the pool, and positioned the others so they would have clear lines of attack the moment time resumed. Then he stood at the edge of the pool itself and released the button.
The vines that still had life thrashed once and died under the sudden focused assault. Leafa's blade and Fury's light finished what remained. The pool of liquid shadow shivered, then began to drain slowly into cracks in the floor as if the source feeding it had been disturbed.
A low roar rolled up from deeper in the complex.
Leafa wiped her blade. "It knows we are here."
Sekai checked the timer. One day and two hours remained. "Then we keep moving before it decides to come to us."
The corridor beyond the chamber sloped downward at a steeper angle. The black growth on the walls grew thicker. In places the stone itself seemed to breathe, expanding and contracting in time with the distant pulse.
They found the second sealed door half open, its wards completely dead. Beyond it the air turned almost solid with cold. A wide platform of cracked white stone jutted out over a vast open space. Far below, something enormous shifted in the dark.
Fury's voice dropped to a whisper. "This is not another failed vessel. This is older."
Sekai stepped to the edge of the platform and looked down. In the depths, a shape the size of a small fortress slowly uncoiled. Dozens of glowing red cores burned along its length like a string of angry stars. Black chains thicker than tree trunks still bound parts of it to the walls, but many of the links had already snapped.
The pulse they had felt since entering the lower levels came from that shape.
Niña swallowed. "Please tell me we are not fighting that thing in the open."
Sekai's hand closed around the controller. "We are not fighting it in the open. We are ending it before it finishes waking."
He pressed the pause button once more and began the long walk down into the frozen dark.
The true heart of Highmere was waiting. And the timer was still counting.