After dealing with one opponent. What he gained wasn't just soul essence and system entries, but an entire complete realm sea! A realm sea could nurture great existences like Primordial Ultimate Great Luo Golden Immortals or even Supreme Gods—its value naturally went without saying. He even speculated that a single realm sea could only nurture a limited number of Primordial Ultimate Great Luo Golden Immortals, possibly just one! Now, with coordinates to three realm seas, Su Yuan had more choices. This would provide immense assistance in his future cultivation path—these benefits were truly enormous. "This realm sea is called the Abyss Realm Sea in the system interface, meaning the protagonists here aren't the multiverse, but the Abyss! If this world has a path to supremacy, it should be within the Abyss!" Su Yuan gazed toward the direction of the Abyss, pondered briefly, and decided to go explore the Abyss. He set up a demon summoning array in an ordinary world. Fifteen minutes later, a demon was summoned. Upon seeing a human, the demon immediately revealed vicious killing intent. Su Yuan said to it: "I am your summoner! You may return now." The demon froze in confusion. The summoning array dissolved, and the demon returned along the summoning connection. Su Yuan waited a moment, then immediately sensed a thread of mental consciousness extending from the deepest parts of the realm sea. With a thought, Su Yuan's consciousness traversed along this connection. On a dark continent, a demon roared in anger. The next moment, a sky demon passing overhead dove toward it, instantly tearing the demon apart and swallowing it. But soon, the sky demon's vicious eyes showed confusion—the demon corpse contained surprisingly little power. The sky demon disdainfully spat out the body fragments, spread its wings, and immediately departed. Shortly after, at the original location of the corpse, a demon inheriting ninety percent of the previous demon's power reformed. Su Yuan experimentally moved his new body, looking curiously at his front claws. This demon was only at second tier, equivalent to Earth Immortal realm. With ninety percent inheritance, Su Yuan also reached Earth Immortal realm. Su Yuan's main body separated a wisp of soul that merged into this mental incarnation. In an instant, this incarnation transformed into his avatar, gaining qualification for advancement. Su Yuan looked up at the sky—the blood-red clouds reflected endless killing intent. Each glance made the killing desire in his heart grow stronger. This world was truly insane. As Su Yuan contemplated, a demon nearby seemed to notice him and quickly pounced. Just as the demon leaped to bite, Su Yuan's body deftly sidestepped, then used his claws to pierce through the demon's scales and extract its heart. The demon looked back in shock, the killing intent in its eyes gradually fading as life drained away. Su Yuan looked at the heart in his hand, his body instinctively signaling a desire to devour it. Su Yuan shook his head—he had no interest in raw demon hearts. With a thought. A new demon mental incarnation appeared atop the fallen demon corpse. The heart in his hand instantly lost vitality, its power remotely returning to this demon incarnation's body. This demon incarnation shook its head, then looked at Su Yuan. Two versions of himself stared at each other, both demons grinning. One remained a mental incarnation, not converted to an avatar. One avatar was sufficient—he could always convert more later. Additionally, demon bodies seemed to possess special evolutionary traits—they could grow simply through killing and devouring. With enough killing and consumption, their strength would increase. Thus, demon mental incarnations could apparently grow independently without needing conversion to avatars. While Su Yuan contemplated, the demon incarnation beside him walked toward the distance. Su Yuan's avatar also headed in another direction. Soon, Su Yuan encountered another second-tier demon and easily killed it. A second demon incarnation rose from the ground and continued hunting further away. Meanwhile, Su Yuan's avatar absorbed Abyssal Qi from the Abyss to elevate its realm. Before long, Su Yuan noticed the first demon incarnation had found enemies. After battle, the demon incarnation easily prevailed, gaining a third demon incarnation. Thus, in a short time, Su Yuan had over thirty demon mental incarnations. But at that moment, one mental incarnation perished. The power that belonged to that incarnation remotely merged into Su Yuan's demon avatar. This significantly advanced the strength of Su Yuan's avatar. Su Yuan frowned toward that location. "Instant Transmission." In an instant, he appeared at the spot where the demon incarnation had just perished. A sky demon was picking at the demon's remains. Seeing Su Yuan appear out of nowhere, the sky demon immediately turned and attacked. Su Yuan flashed, instantly appearing above the sky demon's head. With a claw strike infused with Metal Law at the tips, he easily tore open the sky demon's skull, extracting and crushing a demon core. Su Yuan opened his hand, letting demon core fragments fall toward the ground. But before they hit the ground, the sky demon's corpse reassembled into a new sky demon incarnation that spread its wings and flew into the distance. "This Abyss is truly bizarre—so many Immortal realm demons encountered so casually!" Su Yuan exclaimed. He had just soul-searched and discovered the sky demon's memories were extremely brief. It had hatched from a demon egg, immediately fighting and killing other demon spawn after birth. Through constant devouring, it broke through to late second-tier sky demon level in merely a century. And such demons were countless in the Abyss. "Bizarre Abyss!" Su Yuan marveled, then divided his consciousness to control mental incarnations to kill further afield. Half a day later, Su Yuan's mental incarnations had spread throughout a nearby mountain, where he saw a demon fortress on the distant plains. From the mountain vantage, the fortress appeared massive. Su Yuan felt capturing this fortress would indeed require considerable effort. Meanwhile, inside the fortress, a demon lord paced irritably. "Ordered to attack the Divine Plane again? I just finished one battle!" At the demon lord level, they weren't controlled by killing urges anymore, but the Abyss Will forced them to kill, invade, and plunder! Once or twice was manageable, but repeated missions risked eventual failure—and that meant annihilation. Even resurrection methods left in the demon castle were useless because once weakened, demons would immediately attack, denying recovery opportunities. Thus, he was deeply troubled. "I'm just a tool of the Abyss Will!" the demon lord sighed gloomily. He then immediately ordered his army to prepare for assault on the Divine Plane. After his departure. Su Yuan's demon incarnations continued rapid expansion. Su Yuan discovered that even without devouring demons, the first demon incarnation's strength increased through killing alone—advancing from early second-tier to mid second-tier! This progression speed was terrifying! Seemingly, some will reward killing behavior—any killing activity brought benefits! "This place is practically heaven for me!" Su Yuan couldn't help but laugh. One mountain after another fell under Su Yuan's mental incarnations. Ten days later, his mental incarnations numbered eight million. Countless demon incarnations simultaneously paused, then charged toward the demon fortress. The demon lord, freshly returned from the Divine Plane, rested wounded and battered in his castle. Suddenly, he felt ground vibrations. Puzzled, he exited to look into the distance—and saw endless demons attacking from all directions! Panic immediately gripped him. "Dammit, was intelligence leaked? In my severely wounded state, I'll certainly die if forced to fight now." He panicked briefly, then quickly noticed the attacking demons, while numerous, were mostly lower realm. The most update n0vels are published on n͟o͟v͟e͟l͟f͟i͟r͟e͟.net Seeing this, his confidence surged, and he immediately commanded his demon legion to suppress them. Squadrons of demon soldiers poured from the fortress's eight gates, clashing with the invading demons. The demon lord observed the battle from the castle's highest point. Upon initial contact, the demon army displayed astonishing combat power, overwhelming the invaders. The demon lord relaxed significantly—the casualty ratio was remarkably favorable at one to ten: one ally lost per ten enemies killed. But soon he noticed something wrong. The slain demons dissipated like smoke, while his fallen soldiers stood up again within one breath after death—and attacked their former comrades! "Are these undead?" the demon lord wondered aloud. Undead were special products of the Netherworld, capable of spawning skeletons from corpses, easily creating skeleton swarms—a quantity-over-quality race. But the battlefield transformation only resembled skeletons because these resurrected demons still had flesh and blood, and their combat power didn't seem significantly diminished like skeletons. The demon lord immediately sensed trouble. Though the eight million demons were quickly eliminated, the battle continued—now the castle's enemies were their former allies. These allies' strength seemed reduced by ten to twenty percent, but their combat skills improved exponentially, easily overwhelming intact demon soldiers! Thus, the enemy numbers grew during fighting until even demons showed terrified expressions. "Devils! These demons are devils crawled up from hell!" the demon lord screamed.