After repeated trials on a dozen or so spiders, Yang Ling had grasped the general rule. Basically, for every portion of red magical power that was lost, two portions of green life energy had to be lost as well. Two hours later, he successfully forcibly promoted ten spider squad leaders under Wolf Spider King from second rank to third rank.

  After advancing, the ten spider captains grew from bathtub-sized to small calf-sized. Not only did their carapace further harden, but their intelligence also received a further boost, no longer being as mechanical and rigid as before. Although their comprehensive combat strength was still inferior to that of the 4th-stage Wolf Spider King, their venom's range, toxicity, and commanding ability were all on a completely different level.

  It's unclear whether it's the energy required for advancement that is much higher or something else, but ordinary spiders can advance quickly. However, after Yang Ling spent more than half a day, the Wolf Spider King still didn't show any obvious changes, forcing him to give up on the idea of helping it advance quickly.

  Is there really no other shortcut besides Wu Li and life energy?

  Looking at the wolf spider king lying quietly in front of him, Yang Ling's heart suddenly moved. At first, the wolf spider king was just an ordinary spider leader, but after continuously devouring several crystal nuclei of other spider kings, it quickly advanced from second rank to fourth rank. Whether it was combat power or intelligence, both had made a qualitative leap.

  Perhaps after devouring several advanced crystal nuclei of the same kind, the Horned Beast and Evil Eye can also advance to a Wolf Spider King-like monarch?

  The spider army has a wolf spider king in command, and when encountering an enemy, it can react flexibly on its own. Only the evil eye and hornet beast still need to be ordered once. On the battlefield, information changes rapidly, and if you slow down even slightly, you might miss a rare opportunity. If the demon beast army has a certain ability to adapt, the strength of the entire team will surely soar.

  Among the many demons, the one that annoyed Yang Ling the most was the slow-moving Evil Eye. Although they had improved their movement speed after advancing, they were still far inferior to the Hornet Beast. With their poor defensive capabilities and mobility, if they were ambushed by the enemy on the battlefield, the consequences would be unthinkable.

  Since the Wolf Spider King cannot advance for the time being, it's better to focus on taming or cultivating the Evil Eye King. After all, although the Evil Eye has obvious disadvantages, its advantages are also the most prominent!

  Against the enemy's heavy armor and large defensive shields, not to mention fist-sized hornets, even heavy tank-like withered warriors might be powerless. But the evil eye is different, a single evil eye's attack may not be that fierce, but when tens of thousands of light balls hit the same point, its power is absolutely unmatched. The great war against the Barbarians and Ymir has already fully proven their power.

  A simple three-row gunner formation has already greatly increased the power of Evil Eye, and Yang Ling dare not imagine what kind of combat power it will have if Evil Eye has a king like Wolf Spider King with efficient management and command!

  After a moment of contemplation, he decided to return to the legendary cursed Valenia Valley, where evil eyes appeared most frequently. With good luck, maybe in one or two days, he could hunt and kill several groups of evil eyes, smoothly cultivating the king of the evil eye army.

  With the speed of a swift unicorn, after many hours, Yang Ling arrived at the desolate Valenia Valley. Outside the valley, snowflakes fluttered about, but inside the valley, thick smoke billowed out from time to time, making it stifling and hot. The snowflakes melted into water vapor in mid-air, and from a distance, a thick layer of fog shrouded the sky above the valley, looking eerie beyond compare.

  To prevent startling the snake in the grass, Yang Ling put away the unicorn as soon as he entered the valley and only released a team of horned bees to protect him closely. Relying on his body that had been strengthened again, he quickly shuttled through the rocks, since this time's goal was the crystal nucleus of the high-level evil eye, it was naturally not necessary to waste time on those isolated low-level evil eyes.

  The deeper he went, the higher the ground temperature became. Fortunately, his body had been strengthened so many times that his physique was far superior to that of ordinary people. Otherwise, it would be difficult for him to move forward, and there would be no place to set foot.

  Deep in the Valenia Volcano Valley, I occasionally see some exposed Darkfire Crystals. Unfortunately, there are too many impurities, and they don't even meet the requirements for setting up an array. However, since there are so many Darkfire Crystals on the surface, it's likely that underground is a massive crystal mine, which can be excavated on a large scale in the future.

  Along the way, apart from the occasional evil eye, there were also giant geckos that could spit out a ball of flames as soon as they opened their mouths. Unfortunately, their movement speed was slow and their defensive capabilities were no better than those of the evil eyes, while their attack power was far inferior, making it not worth spending spiritual energy and magic to tame them.

  According to the memory of the tamed evil eye, deep in the valley was a vast basin, with caves all over and covered with low shrubs, which was the habitat of wild evil eyes. So Yang Ling walked like the wind all the way, sometimes in order to hurry on the road, he would directly jump from one boulder to another. Before the giant geckos blocking the way could react, he quickly flew by at a low altitude like a hawk.

  After rushing to the depths of the valley, the evil eyes indeed increased, and from time to time, large groups of evil eyes slowly wandered around, searching for dark fire crystals or a kind of sandy pear-like fruit to eat.

  Unlike ordinary creatures, the evil eye has no hands or feet. Before evolution, it only had two tentacles on the left and right sides, relying on its innate floating technique to move, but unlike flying animals, they can only float about ten centimeters above the ground. When encountering protruding rocks or tree roots, they can only bypass them, and their movement speed is extremely slow.

  After advancing to the second stage, the evil eye on the left and right will each grow a green tentacle, mainly to speed up the recovery of magic power, and has little effect on movement speed. Only after evolving to the third stage, one more tentacle grows on both sides, and the speed is improved.

  After letting go of several groups of slow-moving evil eyes, Yang Ling stared at a group of evil eyes that were obviously faster. At first glance, although he couldn't find any outstanding kings, he found several evil eyes that had evolved to the second stage. Looking at the movement speed of the other evil eyes, it's estimated that they have also evolved to around the late first stage, much stronger than the other groups of snail-like peers.

  Following the target to a small valley, they saw them swarming into the valley to forage, completely unaware of the danger behind them. Yang Ling smiled coldly and hid aside, quietly summoning the entire demon beast army.

  Although he was confident in commanding the demon beast army to rush up and quickly solve this group of wild evil eyes that were completely defenseless, he still acted with caution. According to the memories of the tamed evil eye, the valley deep in the mountain was densely packed with caves, some of which were bottomless, and even connected to a mysterious underground city. He didn't want to accidentally provoke a large group of troublesome high-level demon beasts when he wasn't ready to take action.