The pillar was a masterpiece of ancient engineering. And embedded directly within the impenetrable white stone of the structure, glowing with a soft, pulsing light, were 7 cores.
But not any normal cores. Dragon hearts.
Ren reached into his shadow space and withdrew the big, hyper-dense core of the 100 years Fire Dragon he had slaughtered just a few hours ago. He held it up, bathing the dark room in a warm, crimson glow, and compared it to the ancient hearts embedded in the pillar.
The structural similarity was undeniable.
These were not the crude energy batteries found inside standard beasts from Platinum 3 downward. Common cores depleted rapidly after death and pushed their energy into the ambient ether once their host died. But a true dragon’s heart had fundamentally transcended the purely physical realm. It was a crystalline structure capable of actively interacting with the world’s primordial ether and permanently storing vast amounts of raw data within its system lines.
Ren walked toward the royal vault section of the chamber. He carefully placed the glowing Fire Dragon core onto the pedestal alongside the four others currently resting there.
These were the ultimate spoils of humanity’s history. The ancient cores harvested from the dragons King Dragarion had slain years ago during his legendary crusade, resting alongside the one Ren himself had felled months prior with the combined might of the Vanguard backing him.
Five ancient, unfathomable cores, gathered together in the dark.
And absolutely no one in the world knew how to use them.
Every single classified experiment conducted by Arturo’s brightest scholars and Wei had ended in failure. And even Ren, armed with the forbidden knowledge of the Brain and his own unprecedented mastery over elemental engineering, did not feel remotely close to comprehending the technology required to build something like the central pillar.
That massive structure functioned as the undisputed heart of the underground second chamber. It actively controlled the flow of ambient mana across the entire city. It compressed the ether to generate the crystals they had harvested, and it ruthlessly siphoned any surplus energy, purifying it, unifying the chaotic elements, and forcefully pumping it downward into the very core of the world.
It was a level of bio-mana-mechanical engineering that vastly exceeded anything Ren could currently hope to replicate.
But it didn’t matter. They hadn’t come here today to study it, reverse-engineer it, or replicate it.
They had come to use it.
♢♢♢♢
"There is no time left," Ren ordered, his voice echoing off the cavern walls, sharp and devoid of fear. "Brace yourselves."
He stepped forward, approaching the central control console of the monolithic pillar.
He slowly extended his right hand, hovering just inches above the indestructible surface. Even without making physical contact, he could feel the terrifying, ancient current thrumming inside the stone.
It was incredibly dense... It was a roaring, primordial river of raw ether that fueled the entire chamber system.
Before he dared to absorb a single drop, he engaged his fusion.
Pushing his power output completely past its natural limits to achieve the Diamond rank was the absolute, non-negotiable foundation of this suicidal plan. Without the localized system immunity granted by his triple-fusion, absorbing even a fraction of this energy could mean some level of irreversible crystallization.

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