Chapter 11: The Pulse That Trembles Stone

"Your legs are lead? That's fantastic," Rangga muttered, his hands hovering frantically over his glowing abdomen as a sharp, rhythmic thump echoed from his skin like a heavy bass drum beating inside a hollow log. "Just great. I survived three corporate layoffs and a psychotic boss only to become a walking tectonic sensor for a cursed mountain."

Arung tried to push himself up from the cold cave floor, his boots sliding uselessly against the damp earth. A spasm of nausea crossed his sharp features, and he caught himself on one elbow, his breath hissing through clenched teeth. "Stop complaining and check the back of the cave. The seismic resonance isn't just in your head—look at the ceiling."

Rangga jerked his gaze upward. Overhead, the jagged limestone stalactites hanging from the cavern roof weren't just casting shadows; they were visibly shivering, fine lines of fracture spider-webbing across their bases in time with the heavy, geological cadence pulsing from Rangga's chest. A shower of loose gravel and fine white dust rained down on them, stinging their eyes.

"They're going to snap," Rangga said, his voice pitching an octave higher as a jagged chunk of stone crashed down barely a foot from his left boot, shattering into a hundred sharp fragments. "Arung, seriously, the whole roof is coming down. Tell your ancestral ghost stories to wait until we're outside."

"Do you think I'm controlling this?" Arung snapped back, his voice strained as he finally managed to lurch onto one knee, though he immediately staggered like a drunkard. He grabbed a jagged outcropping of rock to steady himself, his knuckles turning white. "The Buntu bloodline wasn't chosen to worship this place, Rangga. We were bred to bear the weight so the valley didn't have to. And now that you've let the core synchronize with your nervous system, the mountain is using your heartbeat to anchor its shifting plates."

"My heartbeat?" Rangga stared down at his torso, where the amber markings were glowing so brightly they illuminated the dark corners of the cave like a welding torch. The skin beneath the lines felt fever-hot, stretched tight as a drumhead. "It feels like a jackhammer is trying to break out of my ribs. How is this even biologically possible?"

"Biology stopped applying the moment we crossed the ridge," Arung said, wiping a streak of cold sweat from his forehead with the back of his hand. He took a heavy, stumbling step toward Rangga, his eyes locked on the glowing amber sigil. "Give me your arm. If you don't let me ground a fraction of that charge through my own pulse, your heart is going to explode from the feedback loop."

"And if you take too much?" Rangga asked, stepping back instinctively, his shoulders hitting the cold stone wall behind him. The air between them crackled with static electricity, making the hairs on his arms stand on end. "What happens to you, Arung?"

"I burn out," Arung replied flatly, his voice devoid of hesitation, though his eyes betrayed a sudden, dark flash of fear. "Just like the generations before me. Now stop wasting time and give me your hand before the next tremor brings the whole mountain down on our heads."

Before Rangga could argue, another violent shockwave rolled through the cavern, louder and deeper than the last. A long, groaning crack echoed through the stone as a massive slab of the ceiling split right down the middle, showering them in a dense cloud of choking dust.

Arung lunged forward with surprising speed, his hand clamping around Rangga’s wrist with a grip like a vise. The moment their skin made direct contact, a blinding flash of violet and amber light erupted between them, throwing long, writhing shadows against the cave walls. Rangga gasped, his eyes rolling back as a torrent of raw, white-hot energy surged from his chest, racing down his arm and flooding into Arung's body.

Arung’s back arched violently, a choked groan tearing from his throat as the heavy, crushing weight of the mountain’s core transferred directly into his veins. For a terrifying second, both of them stood locked together in the blinding glare, their pulses locked in a frantic, deafening rhythm that drowned out the sound of falling rock.

"Hold on!" Arung choked out, his voice distorted, echoing with a strange, multi-layered resonance that sounded like multiple people speaking at once. "Don't let go—if you break the circuit now, the backlash will vaporize us both!"

"I'm not letting go!" Rangga yelled back, his fingers tightening around Arung's wrist with desperate strength, his own panic eclipsed by the sheer, overwhelming terror of the energy threatening to tear him apart from the inside out.

With one final, ear-splitting crack, the seismic pressure in the cave abruptly snapped, the aggressive thrum shifting from a violent hammerblow into a steady, low-frequency hum that vibrated gently against their teeth. The blinding glare faded into a dull, pulsing glow, leaving them panting heavily in the semi-darkness, chest to chest, sliding together down the rough stone wall until they collapsed into the dust at the base of the cavern.

Arung lay motionless for a long moment, his eyes closed, his chest rising and falling in shallow, ragged gasps. The dark, stagnant veins on his arms—the remnants of the forest hound's venom—had faded significantly, replaced by a faint, glowing trace of amber matching the markings on Rangga's skin.

"You're an idiot, Rangga," Arung whispered hoarsely into the dirt, not opening his eyes. "A stubborn, reckless Jakarta idiot."

"Yeah, well," Rangga panted, staring up at the fractured ceiling where a single ray of pale morning light had finally pierced the gloom, "your family's security system really needs an update."

Arung let out a short, wet cough that sounded dangerously close to a laugh, though he didn't move away. His hand remained loosely linked with Rangga's, their fingers tangled together on the cold cave floor, the residual heat from the merge humming quietly between them like a living thing.

"Can you stand?" Rangga asked quietly, his anger and fear momentarily giving way to a strange, heavy concern as he looked down at the pale, exhausted face of the man who had just taken half a mountain's wrath into his own body.

"Give me ten seconds," Arung murmured, his thumb brushing once against Rangga's knuckles before he forced himself up onto his hands and knees. "Then we run before whatever woke up out there decides to come looking for us."