"The fool tries to swallow the lake because he is thirsty; the wise man takes a cup."
Leaving the resin pillar wasn't a simple matter of climbing down. Vane-Uru's earlier shift had brought the cavern's ceiling down with her, creating a jagged, unstable boulder field perfectly level with our plateau. The faint ambient light from the cave-bugs above vanished entirely inside the tight, and choking gaps between the fallen rocks.
We couldn't go over, and squeezing through the shifting crush of the ceiling collapse was suicide. Maybe Pendra could, but we were built differently and had vastly different parameters for what we considered safe. Our only path was down, directly into the massive, and hollowed-out husk of Vane-Uru’s upper coils—the same structural system I had used to reach this cavern in the first place. Judging by the cavernous layout, centuries of concentrated Rot and Toxic Qi must have broken down her softer internal tissues, leaving behind a petrified labyrinth of empty veins, dried bio-chambers, cable-like tendons, and chitinous tunnels.
We were walking though the fossilized body of a sleeping myth.
We hit our first intersection twenty feet inside. The internal tunnel fractured into a massive junction of dried arteries. The air in each path felt equally dense, thick with heavy metals and the stagnant, and sharp taste of Rot Qi. Guessing wasn't an option. One wrong step into a pocket of concentrated acidic vapor trapped in an atrophied tracheal chamber, and my own lungs would melt before I could curse my stupidity.
Murphy’s Law: If anything can go wrong, it will.
My refusal to wander blindly inspired my second rock talisman. I reached into my pocket and pulled out the smooth, square chitin plate etched with the mycelial algorithm.
"Stay behind me," I projected to Pendra through the tether.
She received the message, but I still had to keep a constant, conscious tension on our link to prevent her from bolting ahead. It was clear her predatory instincts gave her a better baseline for navigating this dark than me, but our connection had introduced an irritating psychological variable: I was worrying about her subconsciously. It felt like an underlying pit in my gut that flared up every time her emotions signaled an urge to venture ahead. Worse, I could feel a building kinetic tension radiating through the link. Her biological drive was demanding a target to neutralize, and without data on how a spirit beast's psychological backlog affected a human tether, I didn't want to find out what happened when she redlined.
Putting that problem on the back burner, I sorted through my talismans. They weren't uniform in size or material, but I had calibrated each one before leaving, jotting brief operational notes on a separate plate since my fountain pen refused to draw ink normally anymore—not a surprise, considering the caustic, high-acid mixture I had been using to etch the chitin. Feeling Pendra’s impatience spike within the link, I threw the mycelial plate hard against the jagged edge of the central artery.
The chitin shattered with a sharp, echoing crack.
The compressed energy triggered instantly. A dense knot of blue bioluminescence erupted from the impact point. Instead of forming a static barrier, the fungal threads behaved exactly like a starved slime mold. They shot outward across the petrified floor in a frantic, forward-moving cone, seeking raw resources and breathable air currents.
I watched in silent fascination as the glowing blue veins raced down the different biological tunnels. It was cartography in real time. Down the far-left path, the threads hit an invisible pocket of highly alkaline gas trapped in an old digestive duct; they instantly blackened, died, and withered back. The main network immediately rerouted its energy away from that dead zone, pushing deeper down a narrow, jagged fissure to the right.
Within thirty seconds, the fungal colony had mapped the entire junction, leaving a glowing, pulsing blue line that traced the path of least resistance through the giant's hollowed anatomy.
"Follow the blue," I muttered aloud while projecting the visual pathway through the link. Pendra just glared back at me. Impatience. Weakness.
I gave her an unimpressed look and walked past her without sending any further mental feedback. I had nothing to prove, but everything to lose; I still hadn't calculated how a severe injury or death on her end would feedback into my own nervous system. I needed her to be functional if I planned on surviving this ecology.
As we followed the mycelium trail deeper into the shell, the physical environment began to shift. We were passing out of the completely dead, and hollowed zones and drawing closer to what my internal compass suggested was the core mass of Vane-Uru's living tissue.
That was when the atmospheric pressure altered into something far more volatile. While my own core formation had given me a higher tolerance for ambient pressure, this shift was different. It stopped feeling like barometric weight and started registering as a localized gravitational pull.
My boots hit the petrified tissue with the force of lead weights. Every step required a deliberate, exhausting contraction of my reinforced muscles. My bones, which had grown painfully dense from my crude, self-taught attempts at body cultivation, were likely the only things keeping my structural framework from snapping under the strain. Part of me was tempted to swallow another energy bolus, but I resisted. Based on the cellular degradation I'd observed in other high-energy organisms, overloading unrefined pathways was an easy way to cause permanent tissue necrosis. I didn't have enough diagnostic data to risk it.
This wasn't an external spell; it was the sheer, localized mass of a Rank 4 Spirit Beast warping its immediate environment. It was difficult to quantify the exact physics behind this level of density, but no other hypothesis fit the data. I needed to stop evaluating this world through the lens of what I used to think was possible, and start operating like a scientist entering an unclassified biome. Everything is a variable until proven otherwise.
Suddenly, a low, and grating tectonic rumble traveled through the floor, vibrating up my shins and rattling my teeth. But the wind didn’t hit us from the front.
