Under the influence of the binding force of the contract and the driving force of fair trade, Su Hao and the apprentice called Paladin, and together with Zur, hurried to the evil cave.

As he traveled, Zur saw several corpses and used the "Skeleton Warrior Resurrection" dead-word summoning spell on them. The corpses were dissected from within, and one skeleton after another, holding a bony sword in their hands, broke free from the shackles of flesh and stood in front of Zur dripping with blood. The movements of their getting up are very smooth, there is no friction and jerkiness when the skeleton is moving, and the soul fire burning in their eyes is like two warm candles, giving people the feeling of human gaze.

As the Blood Wastes progressed, the number of skeleton warriors grew, and when they reached 20, Zur summoned 20 more skeleton mages. These skeleton mages may seem a little more slender than skeleton warriors, but with their palms on the surface of elemental power, they are very good at long-range magic strikes, and when combined with melee skeleton warriors, they can be a decisive force on the battlefield and dominate the outcome of a war.

Under the protection of the Skeleton Legion, there are almost no enemies who can stand in front of them for more than 5 seconds, even elite-level monsters can't parry, and after a round of blows, they fall to the ground in an instant. Under the suppression of strong strength, the road was unimpeded, and everyone successfully arrived at the evil cave.

After entering the evil cavern, he immediately came to a remote corner where the black heart was buried. As a master necromancer, Zur is extremely sensitive to forces that tend to be evil in nature, and even through the thick ground, he can still feel the faint evil aura coming from the ground, obviously, as long as he digs three feet into the ground.

Soon, under the excavation of the skeleton warriors, the black heart was rediscovered, and at the same time, with an incomparably strong pulse, it pumped out one wave after another of extremely evil and corrupting immortal power, and began to corrupt everything around it.

Seeing this, Su Hao, the apprentice, and Paladin immediately stood far away, only Zur jumped steadily down the pit, put on a pair of scale gloves that shimmered with dragon scales, and then picked up the heart and gazed at it calmly.

Soon, Zur's eyes flashed with a strange cyan light, and an overwhelming force of death permeated his body! As if it had been pinched, the black heart that was spreading evil gradually slowed down its strong pulse in Zur's hands, and finally stopped beating helplessly, withered, and scattered into countless ashes, scattered in the air under the blowing of the cavern airflow, and at the same time, an evil force shaped like black smoke broke through the shackles of the black heart, surrounded Zur, and penetrated into his nostrils in an instant.

After absorbing the power of the black heart, Zur couldn't help but take a deep breath, his hands cupped to the sky, his eyes showed a sense of joy and satisfaction, and at the same time, the skeletons who were guarding him also raised their hands in the air and cheered silently, and the entire evil cavern was filled with their strange cheers, and even the air flow stopped for a while.

Su Hao and the apprentice just stood in the distance, quietly witnessing this scene full of ritual and solemnity until the end.

After fully absorbing the power of the black heart, Zur regained his previous demeanor, he looked at the apprentice, and said with a smile:

"Yes, I'm satisfied, this heart has been condensing the power of the Evil Cavern for a whole year, and by devouring it, my understanding of necromancy has taken a step further."

When Paladin heard this, he couldn't help asking, "You mean, this heart is actually a product of the evil cave?" ”

Zur nodded: "As its name suggests, the Cave of Evil is a place to gather evil forces, which is why there are so many monsters living here. And this heart is the product of the excessive concentration of evil forces, from quantitative to qualitative changes... It's not that its appearance causes the corpse to be on fire, but that the Cave of Evil is where evil is born in the first place. ”

Paladin felt a faint sense of despair: "You mean, even if we temporarily clear the evil cave, it won't be a few days before a large number of monsters will gather here again?" ”

"Yes, it's like a piece of poisoned candy that attracts flies and mosquitoes, and once you bite down and get that poison-like power, you can give birth to a 'corpse on fire' again."

When Su Hao heard this, he also understood why Nightmare Mark would say that his action to exterminate all the monsters in the evil cave this time would be named "the first kill".

Because the monsters in the evil cave will regroup, it may take a few days.

After explaining clearly, Zur smiled with satisfaction, looked at the apprentice, and said with a rare hint of joy: "I am satisfied with this deal, it's time to fulfill our agreement, I will teach you how to summon the 'Iron Stone Demon', but this is not a good place to teach, I will wait for you in the hotel room I rented." ”

With that, Zur used the scroll to return to Rog's camp.

Watching the portal summoned by Zur slowly dissipate, Su Hao, the apprentice, and Paladin also stepped through the portal summoned by the Scroll of Return to the City and returned to the Rogue camp again. The portal summoned by the Scroll of Returning to the City is two-way, and it is only when you enter and exit that the power of the spatial magic it contains is exhausted.

After returning to Rog's camp, the trio went to the hotel and to the room rented by Zur.

Paladin still didn't want to get too close to the necromancer if it wasn't for the needs of his work, the guy's unconsciously exuded aura made him uncomfortable, and he looked like he was battered. Now that he was back in Camp Rogg, he took his leave again and prepared to go back to the Rogue Tavern for a while.

After seeing Su Hao and the apprentice, Zur immediately beckoned the two to come in. The two sides sat down, and Zur cut straight to the point: he began to introduce the Iron Stone Demon in detail:

"The summoning principle of the Iron Stone Demon is very simple, but the process of summoning is very complicated, through a complex and mysterious ritual, the metal is condensed and then shaped, and a stone demon can be summoned from it. The Stone Devil requires a certain amount of metal to make it, and the Stone Devil born from it will inherit the properties of the raw material and exert the effects of this property in battle. ”

After Zur finished speaking for the time being, the apprentice asked, "Sounds like summoning the Iron Stone Demon seems to be a very complex and high-level magic, doesn't it require some prior knowledge to learn it?" ”

"How so? It's... It's like making bread, you can make it with white flour, you can make it with rye flour, and you don't have to learn to make rye bread first. The same is true for summoning stone demons, different summoning mediums can give birth to different types of stone demons, such as clay, blood, steel, and fire, and it is not necessary to learn how to play with mud and draw blood first. It's just that since you've skipped the stage of summoning stone demons through the medium of clay and blood, you'll need to invest more energy and time in learning steel stone demons. ”

"How long will it take me?"

"It depends on your talent, maybe a few days, maybe a few months, maybe a few years, maybe... You can't learn it, and you can't. ”