Heart hammering against his ribs, Ren threw his mana perception wide open and shoved his awareness straight through the woody, rocky and metallic shell of the dome, frantically sweeping the dark interior for the missing prisoner.
Half a second later, he found it.
The beast had not gone anywhere... The colossal half mechanical dragon was still sitting right in the dead center of the five-point star array, coiled and motionless in the dark.
It had not breached the wall.
Ren let out the breath he had been holding in his throat, though the wave of relief lasted for one single second before evaporating.
Because the moment his perception brushed against the entity’s mana signature, he understood why the digging had stopped.
The ancient parasite had not given up on its escape, nor had its mechanical limbs broken down from wear and tear.
It was pooling energy.
Ren narrowed his focus, reading the dense currents swirling inside the darkened cage with crystal clarity. The prisoner had pulled its claws back from the stone not out of defeat, but because it had overhauled its entire approach. Instead of grinding away at the rock inch by inch, only to lose all its progress every time Ren came down here to patch the hole, the dragon had gone completely still. It was drawing every trickle of ambient power inward, compressing the mana inside its chest for something else entirely.
’Why change tactics now?’
Ren swept his senses up along the curved interior of the dome, measuring the geometry of the escape tunnel the beast had carved over the last several hours, and the answer hit him like a cold bucket of water.
With its latest burst of shadow-fueled digging, the dragon had pushed the excavation shaft to a structural tipping point. The tunnel itself was still a bit more than 2 days short of the entrance, yet the surrounding stone had been compromised. Every time Ren came down here to "repair" the damage with his earth magic, he was not hauling fresh quarries of granite down from the surface; he was reshaping and pulling rock from the existing containment walls to pack the tunnel shut.
If he did that one more time to fill this new cavity, the entire section of bedrock on this side of the dome would be stretched just as thin. The total volume of stone on this side was fixed; filling the hole meant thinning out the surrounding shell.
The prison had reached the physical limit of how many times its walls could be recycled. And the thing locked inside had figured it out.
That was why the scratching had stopped.
Once the purple dragon realized the containment wall could no longer be thickened back to its original density, the slow war of attrition became pointless. It no longer needed to race against Ren’s repair schedule or dig a tunnel all the way to the light of day. With the stone shell stretched this thin, all the prisoner had to do was sit still, hoard its strength, and save up enough power to blow the weakened wall wide open in a single strike.
That single shift upended the entire logic of their defense.
It was deciding when to leave.


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