Just as the key's phantom was about to solidify, a giant claw pierced through space and grasped Lin Yue's shoulder. The mark on her back beat like a heart, and all its dark purple tentacles suddenly tightened, enveloping both the hub fragment and the key's phantom. Lu Li's code transformed into chains, wrapping around Lin Yue's waist, but the corrosive energy of the tentacles melted it apart. The three afterimages completely dissipated in the impact. He knelt on one knee, and golden code flowed from the cracks in his armor.

"We can't let them get the key!" Lin Yue's thread of time suddenly pierced his palm, blood flowing along the thread into the memory gears. The gears hummed and began to play the memories of the first guardians in reverse—the souls that dissipated within the seal suddenly transformed into streams of light, rushing towards the key phantom. The giant claw phantom roared in pain, and the spiral scales on its tentacles peeled away, revealing the chaotic black fluid writhing beneath.

The shadow of the key solidified within the stream of light. Lin Yue grabbed it and stabbed the tentacles enveloping the Nexus. Dark purple energy melted beneath the key like ice and snow, and the Nexus fragments erupted in a final burst of light, searing the complete star map into her vision. But at that moment, the giant claw's shadow suddenly exploded, its dark purple energy transforming into a meteor shower that struck the mark on Lin Yue's back. She screamed, and the key fell from her hand, plunging into a crack in the star map's space.

"Key!" Lu Li lunged forward to catch it, but only caught a sliver of light. The calico cat's mechanical body disintegrated under the impact of the energy, transforming back into its kitten form and falling to the ground. The memory gears rolled to Lin Yue's feet, their surface covered in spiderweb-like cracks. The star map space began to collapse, and dark purple tentacles curled back, carving new spiral marks on the ground before departing, like a mocking smile.

Lin Yue picked up the memory gear, and the thread of time penetrated the core of the mark. The coordinates that had originally pointed to the antimatter nebula now all shifted to the star map beneath her eyes. "It trapped the key... outside the rift." Her voice trembled. The star map slowly rotated in her pupils, and each mark corresponded to the spiral mark on her back. "Now, we are the key to open the entrance."

Lu Li used the last code to repair the remains of the calico cat's gear collar. The fragments reassembled into a broken ring around the kitten's neck: "When the first guardians blew up the nebula, they must have hidden a backup plan." He pointed to an area covered by chaotic energy on the edge of the star map, "It is marked here as 'Observer's Legacy'. Maybe there is a way to reforge the key." The calico cat licked the gear fragments and suddenly sneezed, spraying out a string of star tracks composed of ancient god characters - exactly pointing to the coordinates of the Observer's Legacy.

The crack in the Entropy Balance Core completely closed, leaving only the spiral mark on the ground, like a poisonous sting embedded in the skin of Order. Lin Yue clenched the memory gears, the Star Scepter and the Dragon Code resonating in her hands. Seventeen colors of light illuminated the star map beneath her eyes. "Whatever lies beyond the rift, as long as the guardian's obsession remains, we must not let it succeed."

Lu Li's golden code outlined the outline of the spaceship in the void, and the broken armor re-condensed: "Next stop, the Observer's Legacy. But before that..." He looked at the mark on Lin Yue's back, and the code simulated countless defense matrices in the void, "We have to insure this mark first." The calico cat jumped onto Lu Li's shoulder and rubbed Lin Yue's wrist with its head. The wreckage of the gear collar emitted a faint blue light, which produced a faint resonance with the memory gear.

The wind swept through the shattered walls of the Entropy Center, carrying the lingering echo of the star map. Chapter 90 concluded, unveiling the mystery of the Primordial Sea. The lost key hung like the sword of Damocles over the multiverse, and the star map in Lin Yue's eyes led them toward another unknown abyss. The spiral mark pulsed beneath her skin, as if counting down the days beyond the rift.