Chapter 92 - 90: The Mountain Had a Heartbeat

Chapter 92: Chapter 90: The Mountain Had a Heartbeat

The fourth tremor cracked three windows in Market Square.

Arin watched one of them split from corner to corner.

Then Mara opened her bakery door.

She looked at the damaged window.

Looked toward the mountain.

Then looked at Arin.

"Fix that."

Arin stared at her.

"The mountain did it."

"You brought the mountain problem."

"Technically—"

"Young man."

Arin stopped.

"Fine."

Mara nodded and went back inside.

Lucan stood beside him.

"Founder Elysium. Defeated again."

"Shut up."

The ground trembled.

This time nobody laughed.

Greyhaven’s emergency alarms activated thirty seconds later.

Not panic alarms.

Evacuation preparation.

Arin had insisted on the distinction.

Panic made people run.

Preparation made them listen.

EVE’s voice spread through the settlement.

"All residents remain calm. Northern work zones are being evacuated. Western and southern districts remain secure. Follow local emergency instructions."

The provisional committee moved immediately.

That impressed Arin.

No waiting for him.

No asking what they should do.

Shelter coordinators checked residents.

Teachers gathered children.

The clinic prepared beds.

Hunters reported to assigned sectors.

Cassian entered the command room.

"Mine teams?"

"Returning," EVE said.

"All accounted for?"

"Three groups confirmed. Fourth group..."

A pause.

"Missing."

Arin turned.

"Who?"

Rian entered at that exact moment.

Covered in dust.

Breathing hard.

"Mine Survey Team Four."

"How many?"

"Seven."

"Location?"

"Lower processing level."

Arin frowned.

"Why were they there?"

"Inspecting the old pumping network."

Reasonable.

Unfortunately.

Lucan checked his sword.

"Let’s go."

Arin nodded.

"Victor."

"Yes?"

"Stay here."

Victor looked personally attacked.

"What?"

"Greyhaven needs mobile response."

"But underground monster."

"Exactly why civilians need someone here."

Victor opened his mouth.

Closed it.

Then nodded.

"Fine."

Arin paused.

That was unusually mature.

Victor pointed at him.

"But if it’s incredible, I want pictures."

There it was.

The route to the mine took eighteen minutes.

A-01 joined them.

EVE remained connected through both the network and her physical body.

Cassian tried coming.

Arin refused.

"You govern here."

"I know the mine."

"So do the miners."

"It’s my town."

"Exactly."

Cassian frowned.

Arin continued.

"If something happens while we’re underground, Greyhaven needs you."

Cassian hated it.

Which meant he understood.

"Bring them back."

"We will."

No promises beyond that.

Arin had learned better.

The freight tunnel had changed.

Cracks crossed the ceiling.

Dust drifted continuously.

Glow crystals flickered.

At kilometer three, Hollowmaw signals had stopped entirely.

Lucan noticed.

"Where are they?"

EVE scanned.

"Gone."

"All?"

"Nearby activity: zero."

Arin didn’t like that.

The Hollowmaws had tolerated the tunnel for years.

Now they had abandoned it.

At kilometer five, they found Glowbacks.

Hundreds.

Running toward them.

Arin raised a hand.

Nobody attacked.

The small creatures streamed around their legs.

One climbed directly over Lucan’s boot.

Then another.

Then twenty.

Lucan stared downward.

"Why me?"

Arin smiled.

"Monster friend."

"I hate you."

The Glowbacks continued fleeing west.

Away from the mine.

EVE watched them.

"Multiple underground species are evacuating."

Lucan’s expression hardened.

"Whatever is moving isn’t normal."

"No."

Arin looked deeper into the tunnel.

"But normal enough to have a geological explanation."

Lucan raised an eyebrow.

"You sound hopeful."

"I am."

Arin had no interest in discovering another forgotten god beneath Greyhaven.

He wanted something he could hit, move, redirect, repair, or build around.

Preferably all five.

They reached the mine access.

The vertical shaft was empty.

No Wyverns above.

Sunlight entered freely.

Arin had never seen the plateau so quiet.

EVE deployed a drone.

The nests remained.

Eggs too.

Some juveniles.

Arin frowned.

"The Matriarch abandoned young?"

"No," EVE said.

"Look."

Broken shells.

Most eggs had already hatched.

The remaining ones were empty or nonviable.

The juveniles capable of flight had left.

The Wyverns hadn’t fled blindly.

They had evacuated.

Lucan looked toward the stone.

"They knew."

"Before our sensors."

"Animals often detect geological activity earlier than humans."

Arin nodded.

Better.

That sounded like a real explanation.

Then the mountain beat again.

BOOM.

Not a tremor.

A pulse.

Dust exploded from the walls.

A-01 anchored himself.

EVE stumbled.

Lucan grabbed her before she fell.

Arin stared downward.

"Source?"

EVE processed.

"Approximately nine hundred meters beneath current mine depth."

Lucan looked at him.

"The mine doesn’t go that deep."

"No."

Another pulse.

BOOM.

Regular.

Almost like—

Lucan said it first.

"Heartbeat."

Arin frowned.

"Don’t call it that."

"Why?"

"Because then something dramatic will happen."

Lucan stared.

"That’s not how causality works."

"Not taking chances."

They found Survey Team Four in Lower Processing.

Alive.

Mostly.

Six workers stood on an old conveyor platform.

The seventh was hanging from a support cable over a newly opened fissure.

Rian’s friend, Jalen.

Arin recognized him.

Jalen looked up.

"Little help?"

Below him was darkness.

Deep enough that EVE’s scanner couldn’t immediately find the bottom.

Lucan looked over the edge.

"How long have you been there?"

"Twenty minutes."

"You sound calm."

"I finished screaming fifteen minutes ago."

Fair.

A-01 secured the cable.

Arin pulled Jalen up.

The worker collapsed onto the floor.

"Thank you."

"Everyone injured?"

"Bruises."

Good.

"Why didn’t you evacuate?"

The survey leader pointed toward the fissure.

"It opened between us and the exit."

Arin scanned it.

Twenty meters wide.

Growing.

Then EVE froze.

"What?"

She moved toward the edge.

Arin followed.

The scanner returned strange results.

Not magic.

Not System energy.

Heat.

Enormous heat.

"Geothermal?"

"Partially."

Another pulse traveled upward.

BOOM.

EVE’s geological model updated.

Then everything made sense.

Arin stared.

Lucan waited.

"What?"

Arin enlarged the scan.

A gigantic chamber existed beneath Greyhaven’s mountain.

Natural.

Ancient.

Filled with pressurized magma channels.

At its center was a mass of dense stone.

Not a creature.

A geological plug.

The mine’s old lower drainage system had been pumping groundwater away from the mountain for decades.

Then Greyhaven was abandoned.

Water returned.

Twelve years of pressure accumulated.

Now restoration had restarted portions of the drainage network.

Pressure shifted again.

The mountain was experiencing repeated hydrothermal bursts.

Lucan stared at the model.

"So the mountain isn’t alive."

"No."

"No ancient monster."

"No."

"No forgotten System machine."

"No."

Lucan looked relieved.

"Wonderful."

EVE continued:

"However, if the central plug fractures catastrophically, approximately eighteen percent of the northern mountain could collapse."

Silence.

Lucan sighed.

"Of course."

The Titanite mine sat directly above the pressure chamber.

Worse, old mining shafts acted like conduits.

If the plug failed—

Steam.

Rock.

Magma.

Gas.

Everything would travel upward.

The mine would be destroyed.

The Wyvern plateau would collapse.

Northern Greyhaven could be hit by debris.

Arin studied the model.

"Time?"

EVE hesitated.

"Uncertain."

"Estimate."

"Between twelve hours and six days."

Lucan stared.

"That’s not an estimate."

"Geology is complicated."

Another pulse.

Stronger.

EVE updated.

"Possibly less."

"Better."

"That was sarcasm."

"Yes."

They evacuated Survey Team Four immediately.

Arin remained.

Lucan noticed.

"No."

"I need measurements."

"EVE can collect them."

"She needs sensors deeper."

"Send drones."

"Signal fails below six hundred meters."

Lucan folded his arms.

"Then don’t go below six hundred meters."

Arin looked at the fissure.

Lucan followed his gaze.

"No."

"We can lower a sensor package."

"Good."

"Manually."

"No."

"More accurate."

"No."

A-01 stepped forward.

"I can descend."

Both brothers turned.

A-01 continued.

"My chassis tolerates higher temperatures."

Arin immediately said:

"No."

Lucan smiled.

A-01 tilted his head.

"You intended to descend."

"Yes."

"You are less heat resistant."

"Also yes."

"Therefore—"

"No."

Lucan laughed.

"Parenthood."

"Stop calling it that."

A-01 looked between them.

"I do not understand why Arin is permitted to make inefficient decisions while prohibiting identical decisions by others."

Lucan put a hand on A-01’s shoulder.

"Welcome to family."

Arin hated this expedition.

They compromised.

Nobody descended.

Instead, Arin fabricated a hardened sensor capsule.

Titanite shell.

Independent recording.

Heat-resistant cable.

They lowered it eight hundred meters.

Data returned.

Pressure.

Temperature.

Mana concentration.

Rock stress.

EVE processed everything.

Then projected three solutions.

Option One:

Evacuate northern Greyhaven and abandon the mine.

Safest.

Option Two:

Controlled pressure release through existing shafts.

Risky.

Could trigger collapse.

Option Three:

Drill a new relief channel into the uninhabited northern valley, redirecting hydrothermal pressure away from Greyhaven and the mine.

Difficult.

Very difficult.

Lucan stared.

"How long?"

"Approximately fourteen hours of continuous drilling."

"And we may have twelve."

"Correct."

Lucan looked toward Arin.

Arin was already smiling.

"No."

"What?"

"That’s the building smile."

"It’s a drilling project."

"Same family."

Arin opened the terrain map.

A relief tunnel.

Nine hundred meters downward.

Angled away from Greyhaven.

If successful, pressure would discharge into an empty rocky basin.

Dangerous.

But controllable.

"Get the tunneler."

EVE replied:

"The current machine cannot withstand projected temperature."

Arin’s smile faded.

"Upgrade?"

"Possible."

"Requirements?"

The list appeared.

DEEP-BORE CONVERSION KIT

TITANITE:

4.2 TONNES

HIGH-DENSITY MANA CRYSTALS:

8

THERMAL CERAMIC:

12 TONNES

FABRICATION TIME:

5 HOURS 40 MINUTES.

Lucan stared.

"Then fourteen hours drilling."

"Yes."

"Total twenty."

"Yes."

"And worst-case failure in twelve."

"Yes."

Lucan rubbed his forehead.

"Wonderful."

Arin stared at the requirements.

Then something clicked.

Thermal stabilization.

Long-range Mana Core.

The research problem they needed for the Civic Exploration Platform.

Both required controlling sustained high-output heat.

Arin looked at EVE.

She understood immediately.

"No."

"What?"

"You are considering using an unstable mountain as a thermal stabilization test."

Lucan slowly turned.

"He’s what?"

Arin pointed at the requirements.

"We need a cooling system for the drill."

"Yes."

"We need to research sustained thermal stabilization anyway."

"Yes."

"So we solve both."

Lucan stared.

"Your city-building addiction is becoming dangerous."

"It saves time."

Greyhaven became a factory.

Within an hour, Elysium transmitted the experimental thermal stabilization design.

Greyhaven’s restored workshops fabricated simple components.

Elysium fabricated precision parts remotely and shipped them through fast transport.

Titanite came from the recovered stock.

Cassian authorized emergency use of Greyhaven’s share before Arin could argue.

"Town first," Cassian said.

Fair.

Former miners worked beside Elysium engineers.

Hunters transported materials.

Merchants surrendered wagons.

Mara fed everyone.

The provisional committee coordinated civilian evacuation from the northern district without waiting for Arin.

Good.

Very good.

At hour three, the first thermal stabilization unit failed.

Spectacularly.

Coolant sprayed thirty meters.

Victor was standing in the wrong place.

Again.

He stared at his soaked clothes.

"Why is it always me?"

EVE answered:

"Statistically questionable decision-making."

Lucan laughed.

At hour four, Prototype Two survived.

At hour five, Prototype Three maintained stable temperature under seventy percent load.

Then:

THERMAL STABILIZATION RESEARCH:

COMPLETE.

Arin smiled.

Another notification followed.

LONG-RANGE MANA CORE:

THERMAL REQUIREMENT COMPLETE.

SUSTAINED OUTPUT TEST:

PENDING.

One step closer.

But nobody celebrated.

The mountain pulsed again.

Windows shook.

EVE’s estimate changed.

CRITICAL FAILURE WINDOW:

9–31 HOURS.

Better.

Maybe.

The upgraded tunneler activated.

Its cutting head glowed.

Titanite reinforcement locked around the frame.

Cooling channels engaged.

Rian stood beside Arin.

"Who drives?"

Arin smiled.

Rian immediately said:

"Oh."

Lucan groaned.

"No."

Arin entered the tunneler.

Lucan climbed into the second seat.

Arin looked at him.

"What?"

"You’re not doing this alone."

"I didn’t ask."

"Family isn’t a room with limited chairs."

Arin stared.

Lucan smiled.

Arin regretted ever saying that.

A-01 entered the rear engineering station.

EVE connected remotely.

Rian remained above with the support team.

Good.

At least one person listened.

The drill started.

Stone broke.

The machine descended into the mountain.

Ten meters.

Fifty.

One hundred.

Heat rose.

Cooling held.

Two hundred.

Pressure increased.

Three hundred.

Then the entire machine shook.

Lucan grabbed the console.

"Problem?"

EVE answered.

"Normal geological movement."

Lucan stared.

"Your definition of normal is terrible."

Four hundred meters.

Five hundred.

The mountain pulsed.

This time they felt it from inside.

BOOM.

The tunneler dropped half a meter.

Warning lights flashed.

Arin tightened his grip.

"Cooling?"

"Stable."

"Hull?"

"Stable."

"Drill?"

"Stable."

Lucan exhaled.

"Us?"

Arin smiled.

"Mostly."

"I hate you."

Six hundred meters.

Then the sensors detected something.

A cavity.

Not on the geological map.

Arin slowed.

Lucan immediately became suspicious.

"What?"

"Open space ahead."

"Natural?"

"Probably."

"You said probably."

"I know."

The drill broke through.

The tunneler emerged into a cavern.

Huge.

Not ancient ruins.

Not a System facility.

Stone.

Crystal.

Water.

Natural pillars stretched upward.

Mana crystals covered the walls.

Thousands.

Maybe millions.

Lucan stared through the reinforced viewport.

"That’s..."

Arin scanned.

EVE completed analysis.

NATURAL HIGH-DENSITY MANA CRYSTAL FORMATION.

Silence.

The entire cavern glowed blue.

The same kind of crystals Elysium used for high-grade infrastructure.

An enormous natural deposit.

Potentially worth more than Greyhaven’s Titanite mine.

Lucan slowly turned toward Arin.

"Don’t."

Arin looked at him.

"Don’t what?"

"Make the mining face."

Arin was already making the mining face.

Then EVE spoke.

"Arin."

"What?"

"The pressure chamber is directly beneath this cavern."

Arin’s smile disappeared.

If they drilled through incorrectly—

They could destroy the crystal formation.

Or worse.

Trigger the failure they were trying to prevent.

The easy route was gone.

Lucan looked at the glowing cavern.

"Can we go around?"

EVE calculated.

"Adds approximately five hours."

Too much.

Arin studied the crystals.

Then the pressure model.

Then the relief tunnel.

A new route formed in his mind.

Not around.

Through.

But not by destroying the cavern.

By using it.

Mana crystals absorbed and stored mana.

Heat affected mana behavior.

Water filled portions of the cavern.

The pressure chamber below contained enormous thermal energy.

Arin’s eyes narrowed.

"EVE."

"I am already calculating."

Lucan looked between them.

"I dislike when both of you do that."

A model appeared.

The natural crystal formation could potentially absorb part of the initial mana surge during controlled pressure release.

Not permanently.

But long enough to stabilize the event.

And if they connected the experimental Long-Range Mana Core—

EVE finished.

"Possible."

Arin smiled.

Lucan closed his eyes.

"How dangerous?"

EVE answered:

"Yes."

Lucan stared.

"That wasn’t a number."

"No."

The mountain pulsed again.

Harder.

A crack appeared across the cavern ceiling.

Arin looked at the crystals.

At the drill.

At the unfinished Mana Core prototype waiting above.

Greyhaven needed the mountain stabilized.

Elysium needed a sustained-output test.

The exploration platform needed the core.

And beneath them sat enough pressure to test every part at once.

Arin opened communications.

"Greyhaven."

Cassian answered.

"Here."

"Evacuate the northern district completely."

"Already moving."

"Get the Long-Range Core prototype from Elysium."

A pause.

"The unfinished one?"

"Yes."

Lucan whispered:

"This is a terrible idea."

Arin continued.

"Bring it to the mine."

Cassian hesitated.

"Why?"

Arin looked through the viewport at an entire cavern glowing like a captured night sky.

"Because we’re going to use the mountain to turn it on."

Silence.

Then Victor’s voice appeared in the channel.

"That sounds incredible."

Arin sighed.

"Why are you on this channel?"

"Emergency response."

Lucan laughed.

The mountain beat again.

This time, the crystals answered.

Every blue light in the cavern brightened simultaneously.

Arin stared.

Not alive.

Not mysterious.

Physics.

Mana.

Pressure.

A problem.

And problems could be solved.

Even when the problem happened to be an entire mountain.

Chapter End