"Then we'll just have to seal this shaft" said Silandra.
"But ... it's huge," said Rooper. "How . ..?"
Taloned arms were beginning to appear over the edge of the shaft. Rooper could hear the hissing of dozens of the creatures. The dark malevolence of their presence was like a constant pressure in the back of her mind.
Silandra looked up. "We bring the ceiling down?
Rok gaped at her. "We do what?"
"Were shutting this place down, permanently. The Republic engineers will provide the Katikoot with a new energy source, and there's enough minerals in those three containers out there to get them by in the meantime."
One of the creatures had made it up over the lip.
Rooper's lightsabers blazed as she sent it back where it came from. "Incoming!" she said.
"All right," said Rok, nodding.
"But you'd better be
ready to run, Silandra. And fast.”
"Rooper?"
"I'm with you, Master." Rooper backed away from the edge.
"Give it everything you have, Padawan. .. " Silandra closed her eyes. Her breathing steadied. She reached out her hands.
On Rooper's right, Rok was doing the same.
Rooper glanced at the creatures coming up over the lip of the shaft. With a gulp, she extinguished her lightsabers.
Trust in the Force.
She closed her eyes.
Colors swirled around her, but they seemed so small and insignificant against the black pit at the center of the chamber, awash with ill feeling and dark intent. The minerals--or whatever they really were had destroyed anything that was once good about these ancient ancestors of the Katikoot.
She felt the pull of her fellow Jedi, reaching out to the rocks, calling them down, and she joined that chorus, lending all she could of her strength.
She heard the rock crack. It was like the roar of the world being sundered.
Rooper opened her eyes.
The ceiling of the chamber had split down the middle, yawning open in a massive sinister grin. As she watched, a hunk of it the size of a small shuttle broke free, tumbling down into the shaft, dragging the swarming creatures in
its wake.
The floor seemed to shift beneath her feet, tilting like the deck of a speeder. More cracking sounds split the air.
Dust rained from above. And then another massive chunk of rock broke free, smashing against the far edge of the shaft before rolling down into the abyss below.
Rooper felt a hand on her shoulder and looked around to see Silandra's face, close to her own. "Rooper, run!"
Rooper ran.

Star Wars The High Republic Quest For The Hidden City Chapter 30 Page 266