With each crystal core swallowed, the evil eye unconsciously let out a roar and quickly merged the energy of the crystal core with the help of witchcraft and life energy.

  Slowly, its crystal nucleus grew bigger and bigger, emitting strands of red light. The mysterious pituitary gland also grew larger, emitting waves of chaotic but increasingly intense fluctuations.

  Go all out!

  As the evil eye's transformation became more and more apparent, Yang Ling gritted his teeth and once again increased the intensity of the energy input. In an instant, the evil eye shuddered all over, its six tentacle-like hands convulsing wildly as it let out a suppressed roar. But at the same time, its crystal nucleus and pituitary gland accelerated their growth at an alarming rate.

  As the thick bloody smell in the cave spread far away, a faint and eerie howl came from afar, getting clearer and clearer, as if some kind of monster was rushing over quickly.

  Listening to the increasingly clear strange cries outside the cave, listening to the suppressed roar of the evil eyes in front of Yang Ling, the rest of the evil eyes fluttering around uneasily, as if instinctively feeling some kind of danger. Soon, the dense three-row gun array became a mess, chaotic and disordered.

  Unlike the panicked Evil Eyes, the spider army under the command of the Wolf Spider King remained calm and collected. As they saw the Evil Eyes' formation in disarray, they quickly climbed up to fill in the gaps left behind, lest some magical beast suddenly charged in. To be on the safe side, the Wolf Spider King also dispatched an elite squad to lurk beside Yang Ling, serving as his temporary bodyguards.

  Although there was no Wolf Spider King-like commander, the Horned Beetle could still barely maintain its basic formation and continue to execute Yang Ling's alert command. As usual, the withered wooden warriors with initial spiritual intelligence were strictly blocked at the entrance of the cave, their sharp thorns and hard tree armor making them the most powerful heavy infantry.

  As for the powerful unicorn, it stayed close to Yang Ling's side every step of the way. As a high-level demon beast, even without Yang Ling's orders, it knew that its master was now in the most vulnerable state.

  Under the intense mental concentration, although he also heard a faint and strange cry. But Yang Ling no longer had the extra energy to command the horned beast to go and see what was going on. As time passed, he discovered a strange phenomenon.

  At first, the evil eye only passively absorbed the witch power and life energy that was fed into it, but at some point, as it swallowed more and more crystal nuclei, it began to slowly actively absorb its own internal energy, with an increasingly fast speed.

  Experiment failed?

  Feeling the surge of witch power and life energy within him, Yang Ling furrowed his brow, sensing that something was amiss. But having drawn his bow, he had no choice but to press on, gritting his teeth as he continuously retrieved and swallowed the magic beast blood pearls from the spatial ring. Replenishing his depleted witch power, he allowed the evil eye before him to absorb the energy within his body.

  He didn't care much about the lush green life energy in the forest. As long as there was enough time, even if it was consumed a lot, it could be quickly replenished. But for the witch power that came from arduous cultivation, he couldn't bear to waste it lightly. After all, the high level of witch power determined whether more magical beasts could be tamed and whether they could quickly advance to the land witch realm.

  After absorbing a large amount of witch power and life energy, the evil eye in front of Yang Ling changed rapidly.

  The six tentacles grew thicker and longer, swelling from the size of an adult's wrist to as thick as a thigh, with two crimson-colored tentacles growing out on either side. They grew thicker and longer, like two red vines.

  The single eye on its head grew larger and larger, slowly growing from the size of a water cup to that of a rice bowl, and its color changed from pale green to blood red. With its constantly wriggling tentacles and black-and-white striped skin, it looked extremely ugly and terrifying.

  The external appearance of the evil eye has changed greatly, but the internal changes are even more pronounced. The fiery red crystal nucleus has expanded to the size of a peach, emitting a scorching red light like a small sun. The pituitary gland has also increased in size by five times, and the fluctuations it emits have become stronger and clearer.

  *sigh*...

  Just as Yang Ling felt something was off, a series of ear-piercing strange cries suddenly came from outside the cave, and it seemed that the cave was heavily surrounded by a group of magical beasts.

  Enemy raid?

  Listening to the strange cries outside the cave, Yang Ling was greatly shocked. With great effort, he drew out a thread of spiritual energy to command the frightened Evil Eyes to re-form their array. He ordered a squad of Hornet Beasts to launch a probing attack, while the rest of the demonic beasts remained on high alert.

  Yang Ling reacted quickly, but the enemy's reaction was even faster. Before the hornet beast could attack, the opponent launched its first wave of strong attacks.

  With a 'whoosh', a group of black flying creatures darted in like lightning, with broad heads and sharp mouths, their razor-sharp claws about half an inch long, one of which left a deep gash on the hard wooden armor of the Dryad warrior. From a distance, their triangular wings, half a meter long, looked strong and powerful, just like flying monkeys.

  According to the Evil Eye's memory, Yang Ling soon knew that the attacker was a mid-to-low-level demon beast called Stone Statue Ghost. It was extremely fast and had sharp attacks, feeding on the Evil Eye's brain pulp and some wild fruits in the basin.

  It's probably because of their hunting that the basin has been unable to naturally evolve a fourth-order evil eye king. In the face of their sudden attack, not to mention low-level wild evil eyes, even the hornet beasts that used to be invincible were temporarily unable to withstand them.

  After exhausting the poisonous stinger in the war with the wild evil eye, facing the stone statue ghost that is not inferior in speed, the hornet beast is absolutely not an opponent in a one-on-one situation. However, with the help of the spider's venomous attack, relying on the advantage of numbers and the stone statue ghosts that rushed to kill, it was difficult to distinguish between victory and defeat.

  The withered wooden warrior's attack was sharp, but unfortunately, its speed couldn't keep up with the swift Gargoyle. Its sharp thrusts were of no use. As for the arrayed Evil Eyes, in order to avoid mistakenly hitting their own side's Hornet Beasts, they couldn't launch a large-scale counterattack either.

  Fortunately, under the command of the Wolf Spider King, the spider army tenaciously defended its position, with dense venom sweeping across the low-flying Stone Golems and Hornet Beasts, stubbornly resisting the enemy's fierce attack.

  The cave is easy to defend but hard to attack. Although the stone statue goblins are ferocious and fearless of death, their attacks are sharp, but facing a large number of hornet beasts and a spider army that fights in formation, they suffered heavy losses. In just half an incense stick's time, a thick layer of corpses was left on the ground.

  Despite the heavy losses, the stone statue devils continued to launch wave after wave of attacks, attempting to forcibly break through the defensive line formed by the hornet beasts and spider army. As more and more stone statue devils poured in from all directions, the situation became increasingly unfavorable for Yang Ling.

  There were several times when a few teams of fearless stone statue demons recklessly charged in front of Yang Ling, and even once, one of the stone statue demons almost clawed at his forehead with its paw. Fortunately, the Wolf Spider King was well-prepared and had set up an ambush, and all the spiders launched a surprise attack, joining forces with the unicorn to kill off the incoming enemy troops in time.

  Damn it, one more bet!

  ******

  As the situation became increasingly dire, Yang Ling gritted his teeth and went all out, pouring all of his magical power and life energy into the Evil Eye. In an instant, the Evil Eye, which was lying in front of him, struggled with all its might and let out a loud roar, as if it were suffering unbearably.

  Yang Ling concentrated his energy and didn't notice that under the effect of the Soul Gathering Array, a wisp of bloody aura also emanated from the stone statue of the dead Gaki, seeping into Xie Yan's brain.

  Slowly, with the influx of a large amount of energy, the evil eye in front of him swelled up like a balloon, swallowing his body's magic power and life energy like an abyss.

  After swallowing the last magic beast blood bead around him, Yang Ling saw that the evil eye in front of him was still endlessly devouring the energy inside his body. He knew that the experiment had already failed. Things had reached a critical point, and if he didn't stop immediately, he would probably be sucked dry.

  Just as Yang Ling was about to forcibly shake off the evil eye in front of him, a sudden change occurred. The tower-shaped mark on his brow suddenly became hot, emitting a vast amount of life energy, forming a dense green mist that completely enveloped the evil eye.

  The suddenly formed green fog occasionally transmitted a burst of oppressive roars, like a dying beast struggling desperately to the death, but listening carefully, it was like a tiger preparing to pounce. What's even more terrifying is that the green fog continued to absorb all the energy around it, swallowing up the blood pool formed by the fresh blood of thousands of wild evil eyes not far away.

  Sitting against the wall of the cave, looking at the eerie green mist, Yang Ling cautiously took out a sharp dagger and tried his best to recover the witchcraft in his body.

  The gargoyle's attack came in waves, but with the combined defense of the horned beast and spider army, there was no possibility of a large-scale invasion in a short period. On the other hand, no one knew what kind of monster the evil eye in the green fog might turn into, so they had to be cautious!

  After absorbing a large amount of blood, the green mist gradually dissipated, and slowly, the outline of the evil eye's transformation began to reveal itself. Eight thick tentacles, as thick as an adult's thigh, over two meters long, with a head as big as a bucket, and a blood-red single eye occupying more than a third of its face.

  Bloodthirsty, ferocious!

  Looking at the mutated evil eye, Yang Ling took a deep breath of cold air, and from this ugly evil eye, he felt a surging wave of magical fluctuations.

  Just as he hesitated whether to take the initiative to solve this abnormal evil eye, with the last wisp of green mist dispersing, the other side let out a thunderous roar. In an instant, all the evil eyes in the cave were terrified and floated over, following behind it and obediently lying down in front of him.

  Did it succeed?

  Looking at the mutated evil eye, and then looking at the dense army of evil eyes behind it, Yang Ling was overjoyed. He understood that he had made a correct bet, successfully cultivating an evil eye king similar to a wolf spider king.

  "Evolve in bloodshed, reborn in slaughter, bloodthirsty, ferocious, and violent! From now on, you shall be known as the Evil Eye Tyrant!"

  After a narrow escape, Yang Ling shook his head. He was just a little bit away from being sucked dry by this guy. It seemed that forcibly upgrading the magic beast's rank wasn't a good idea after all. If he accidentally invested too much of his cultivation, it would be a loss.

  After hearing Yang Ling's words, the mutated evil eye excitedly nodded its head, seemingly very satisfied with the title of Violent King. Like the Wolf Spider King, although it couldn't speak, it already possessed a certain level of intelligence and could express its meaning through body language.

  Battle is the sole criterion for testing strength!

  After taking a deep breath, Yang Ling ordered Xie Yan Bao Jun to lead the Xie Yan Army to launch a surprise attack. Prepare to annihilate the incoming Stone Statue Ghosts, and also take a look at this Evil Eye King, who has consumed so much of his own heart's blood, what kind of skills he really has.