After the three people step through the stone gate, they find a stone passage inside. It is over ten meters long and, after a turn, an even hotter wave of air hits them, almost suffocating.

At the end of the passage, they can see a fiery glow.

The three arrive at the end of the passage, where there is a protruding stone platform. Below the platform seems to be a volcanic crater, with the magma lake constantly churning, continuously releasing scorching heat.

Beside the stone platform, there are steps that spiral down along the walls, circle after circle, extending into the magma lake where there is an island.

The heat inside the passageway is already astonishing, and here it feels even more like Hell; it is unsuitable for anyone to stay for a long time because even breathing here feels like waves of heat.

"Look, someone is there."

Tian Wenxin points at the opposite wall. In the area connected by the steps, countless small caves are carved into the wall. These small caves can accommodate a person sitting cross-legged but cannot block the scorching heat.

The goat beard man looks unbothered and says, "This is the Fire Sea Hell for practicing the Burning Technique, with nine levels from bottom to top. The lower the level, the hotter it is, and the harder it is to bear."

"People thrown here have no choice but to cultivate the Burning Technique to survive, practicing here for half a Golden Crow Day each day."

"That's the bare minimum. Also, for each of the first three levels of the Burning Technique, there is three months' time. If one can cultivate to the fourth level within the stipulated time, they will receive certain rewards."

"From the fourth level onward, every level gained will offer different treatment, and they can also start cultivating other techniques and participate in duels at the Duel Arena."

"As long as you win, you can naturally gain some points and acquire corresponding resources."

Li Feng listens, and it is evident that this place is not solely about relentless pressure but provides some hope. Although this hope is very faint, there is at least a slight opportunity.

This method of leveraging the situation is very clever, subtly leading the war slaves here to accept their fate.

"What if someone doesn't achieve it?"

Li Feng knowingly asks.

The goat beard man smiles faintly, "If one doesn't achieve it..."

Before the goat beard man can say the result, a piercing scream suddenly erupts from a cave in the distant mountain wall.

Hearing the sound, Li Feng looks up and sees a person enveloped in flames, with skin seemingly erupting like molten lava.

This is the Burning Technique rampaging through the meridians.

In the next second, this person loses their footing on the steps and plunges into the magma lake, swallowed without even a splash of lava.

This is the consequence of not achieving the required level.

Here, to survive, one must constantly cultivate to become stronger; if that's impossible, there's only one path left: dying without a grave.

"How many people are here?"

"Currently, there are two hundred and eighteen people. As you can see, the elimination rate here is quite high. Only a hundred or so have reached the fourth level of the Burning Technique, which has completed Magnetic Condensation reaching Foundation Establishment."

"Reaching the sixth level of the Burning Technique almost equates to the late stage of Foundation Establishment, after which one encounters a bottleneck. Over the years in the Duel Arena, the sixth level of the Burning Technique has become rare, and the seventh level is even rarer."

Li Feng and the others are standing at a location not at the highest, but roughly at the seventh level area, one level below the sixth level, with each level further down getting lower.

"Can I try going down?"

Li Feng suddenly asks.

"Hmm?"

The goat beard man turns his head towards Li Feng, suddenly remembering some information about Li Feng. This person has awakened the Vermilion Bird bloodline; for others, this place is Hell, but for him, it might not be.

"Of course you can."

The goat beard man doesn't stop him. He also wants to see the depth of Li Feng's strength.

Tian Wenxin furrows her brows, looking at Li Feng, "You...!"

"Don't worry, I just want to give it a try."

After speaking, Li Feng turns and walks towards the steps beside them. The platform they are standing on also has an array for protection, although the heat is rolling, it is still manageable, at least one can stay.

Upon stepping onto the steps, Li Feng immediately feels the heat capable of steaming alive, and the air above the magma lake becomes distorted.

However, these issues are not significant for Li Feng. He directly operates the Burning Technique to absorb the invading fire spiritual energy around him. The spiritual energy here is nearly ten times as rich as the outside.

Li Feng steps continuously down the stairs, some caves around have people meditating, who have taken off their clothes, exposing their strong upper bodies, with meridians under the skin showing a fire-net color.

This is the Burning Technique Fire Veins.

Li Feng also cultivated the Burning Technique, so he understands that the first three levels mainly involve Magnetic Condensation, allowing one to cultivate unique fire meridians that can accommodate stronger fire energy, but it's also the most dangerous.

Condensing fire meridians not only requires talent but also strong resilience, otherwise the burning pain of the Burning Technique is almost unbearable, like having fire ants crawl through the meridians while being roasted on a hot iron plate.

And once the mind wavers, the fire meridians rampage in an instant, the Burning Technique self-immolating the body, leaving no chance for a redo.

This is why the Burning Technique is classified as a forbidden technique and not promoted.

But the slaves collected in the Duel Arena, their lives hardly count as lives, and thus are treated without restraint.

If one succeeds, it's a great delight; if not, then it's just disposing of trash.

Li Feng quickly walks around the mountain wall to descend one level lower. As he continues downward, the surrounding fire spiritual energy becomes increasingly turbulent and active, but it remains a drizzle for Li Feng.

Previously, when Li Feng cultivated the Burning Technique, although backed by the Domineering Purple Flame, the cultivation went smoothly, but after all, the time was short; Li Feng had not condensed the fire veins documented in the Burning Technique.

Yet at this moment, Li Feng continues operating the Burning Technique while walking, planning to use it to temper the meridians; previously, Li Feng had protected the meridians with Domineering Purple Flame to operate the Burning Technique, which was feasible but absorbed much of the energy from the Burning Technique.

If he can condense fire meridians, raising the Burning Technique to the fourth level, perhaps there will be a bigger surprise.

Li Feng considers this while retracting the Protective Gang Qi Domineering Purple Flame, allowing the agitated fire spiritual energy in the air to continuously invade, the Burning Technique steadily absorbing the fire spirit energy, and soon Li Feng's clothes turn to ashes.

Li Feng, fully focused, continues downward, persistently operating the Burning Technique to temper the meridians, soon his skin beneath reveals one reddish meridian after another.

Li Feng has already undergone one cycle of Magnetic Condensation, and this time, it's a re-tempering.

The Burning Technique continuously moves through the meridians, although similar to the crawling of fire ants, causing unbearable pain, Li Feng merely furrows his brows.

It's not enough.

Li Feng continues downward, his skin nearly igniting, his whole body emitting waves of heat seeming ready to burst into flames.