And the world changed.
The space beyond wasn't solid ground—
it was air.
A cavernous chamber expanded around them, half-hollow, half-living—
the creature's primary respiratory sac.
Warm, humid air slammed into them like a wall.
Fog—thick, yellow-gray—billowed in slow pulses from the chamber's inner membranes.
The ceiling billowed like a giant lung, inflating and collapsing in uneven, tremoring waves.
The walls were thin, semi-transparent, stretching with each inhale, revealing branching capillaries pulsing with dull red light.
And everywhere—
millions of alveoli-like sacs
—tiny breathing bulbs—
inflated and deflated in rippling sequences, releasing bursts of toxic vapor.
Heat.
Steam.
A stinging, metallic smell that clawed at their nostrils.
Ethan coughed violently.
Marcus staggered sideways, clutching Neol as the air burned down his throat.
Caleb dropped to a knee, eyes watering as the fog coiled around him in twisting curls.
Then—
The creature screamed.
Not aloud.
Not in sound.
A psychic shockwave hit them point-blank.
A spike of mental pressure detonated inside their skulls—
sharp, piercing, as if a spear of thought had been driven through their minds.
Caleb collapsed, clutching his head.
Ethan stumbled backward, jaw clenched against the pressure.
Marcus nearly dropped Neol as both of their bodies convulsed from the invisible blow.
Damian's vision flared white.
For one heartbeat, he couldn't breathe.
Couldn't think.
The shriek wasn't rage—
it was panic.
The creature's respiratory sac shook around them, membranes quivering, alveoli spasming in chaotic sequences.
Toxic fog burst from a dozen sacs at once, filling the chamber in choking waves.
Steam hissed.
Flesh trembled.
The entire organ shuddered under its own fear-response.
Damian steadied himself against a trembling wall, breath ragged, head pounding like someone beating a drum against the inside of his skull.
It wasn't just a scream.
It was a flare—
a surge—
a desperate psychic cry that echoed through the respiratory network.
And the pulse—the direction he'd felt in the stomach—
tightened.
Stronger.
Clearer.
Coming from deeper within the breathing system.
Something alive.
Something suffering.
Something calling for help—or warning them away.