The walls of Blood Rainbow City soared into the clouds, resembling an impregnable fortress. Bathed in the afterglow of the setting sun, they emitted an eerie red glow that sent chills down the spine, as if they had been soaked in endless blood.

The bricks and stones on the surface of the city wall have a deep, dark red color, as if telling the story of the bloodshed and violence that this city has experienced.

Chen Feng stood outside the city gate, gazing at the mysterious city from afar. He was tall, and his long black robe fluttered in the wind, giving him a cold and dignified air.

His face was sharply defined, with sword-like eyebrows and bright eyes. Beneath his high, straight nose, his lips were slightly upturned, revealing a subtle smile.

Chen Feng quietly sensed the powerful aura emanating from within the city. It was a suppressive yet chilling force, like an undercurrent surging through every corner of the city.

His brow furrowed slightly, as if he were thinking about something, but he quickly regained his composure.

"There are quite a few experts at the top three ranks, but only a handful of first-rank Martial Saints..." he muttered to himself, a glint of light flashing in his eyes.

Chen Feng, draped in a black cloak, blended seamlessly into the crowd entering the city. He concealed his aura, suppressing his strength to the third rank, and smoothly passed through the city gate guards' inspection along with the caravan.

The streets of Blood Rainbow City are wide and bustling, lined with shops on both sides, and the sounds of vendors hawking their wares fill the air.

Chen Feng appeared to be wandering aimlessly, but in reality, he was secretly sensing the distribution of powerful individuals within the city. His mental energy, like invisible tentacles, silently probed his surroundings.

"The city lord's mansion is in the center of the city, and that strongest aura should belong to the city lord, Gurman." Chen Feng sat down by the window on the second floor of a teahouse, his gaze fixed on the majestic building complex in the distance.

As night fell, Blood Rainbow City lit up. Chen Feng's figure moved like a ghost among the rooftops, avoiding the patrolling guards, and silently approached the city lord's mansion.

The city lord's mansion was surrounded by a defensive array, but it was useless to a master of arrays like Chen Feng. He gathered a wisp of spiritual power at his fingertips and lightly swiped it across the array barrier, opening a gap just wide enough for one person to pass through.

Upon entering the inner courtyard, Chen Feng became even more cautious. He sensed at least five top-tier experts scattered throughout the mansion, and within the central tower, an aura as vast as the ocean was emanating—that of the first-tier Martial Saint, Guman.

"First, set up a trapping formation." Chen Feng took out thirty-six array flags from his storage ring and used his mental power to control them to silently insert them into key locations throughout the city lord's mansion.

This is his original "Heavenly Net Formation," which, once activated, is enough to trap a first-rank martial saint for half an hour.

After the array flags were set up, Chen Feng sat cross-legged on the rooftop opposite the tower, his hands forming a mudra, and silently chanting incantations.

As the last syllable fell, thirty-six invisible energies intertwined into a net above the city lord's mansion, enveloping the entire area.

"Who goes there!" A loud shout came from inside the tower, followed by a blood-red figure bursting out of a window and standing in mid-air.

Chen Feng no longer concealed himself, leaping into the air to confront Gurman across the distance. In the moonlight, he finally saw the vampire city lord's face clearly—

He was tall and strong, with a resolute face, long red hair that danced like flames, and eyes as sharp as a hawk's.

"What brings you to my residence in the dead of night?" Gurman's voice was deep, his blood surging, clearly indicating that he had entered a fighting state.

Chen Feng smiled slightly: "I have long admired the reputation of the Ancient City Lord and have come here specifically to learn from him."

Before he finished speaking, Chen Feng had already charged towards Gurman like an arrow released from a bow, throwing a punch that exploded through the air. Gurman snorted coldly and swung his fist to meet the attack.

"boom!"

Two terrifying forces collided in mid-air, the shockwave sweeping across the surroundings, causing buildings within the city lord's mansion to collapse. Those top-tier experts who wanted to come to their aid were blocked by the Heavenly Net Formation and unable to approach.

"What a strong physique!" A hint of surprise flashed in Gurman's eyes. He hadn't expected that this seemingly ordinary young man could go toe-to-toe with him without being at a disadvantage.

Chen Feng did not answer, but his attacks became even more ferocious. Each of his punches carried the force to shatter mountains and break peaks, forcing Gurman to retreat repeatedly. The two fought from the air to the ground, and wherever they passed, the ground cracked and buildings collapsed.

"Blood Rainbow Piercing the Sun!" Gurman finally unleashed his signature move, a blood-red rainbow shooting from his palm straight at Chen Feng's heart.

Chen Feng was prepared. He condensed his mental energy into an invisible shield in front of him, and at the same time, he pointed with his right index finger, and a golden light shot out.

"laugh!"

The golden light collided with the blood-red rainbow, splitting the rainbow in two, and continued its momentum towards Gurman. Gurman hastily dodged, but the golden light still grazed his shoulder, instantly drawing blood.

"You..." Gurman was shocked and furious. Before he could react, Chen Feng had already pounced on him and slapped him in the chest.

"Bang!"

Gurman was sent flying backward like a kite with a broken string, crashing heavily into the array barrier and spitting out blood.

He struggled to get up, but found that his internal energy was blocked by a strange force and he could not mobilize it.

Chen Feng slowly walked up to Gulman, looking down at him: "Lord Gulman, now we can have a proper talk."

"What exactly do you want?" Gurman asked through gritted teeth.

"Spirit stones, and the rare and precious materials you've collected," Chen Feng said bluntly. "In exchange, I can spare your life."

A look of struggle flashed in Gurman's eyes, but he finally said dejectedly, "The treasure vault is in an underground chamber; the key is in the jade pendant at my waist."

Taking advantage of Gurman's weakness, Chen Feng directly implanted a slave mark to control him, then took the jade pendant and followed Gurman's guidance to the underground secret chamber.

When he opened the treasure vault door, the sight before him made him gasp for breath—

There were piles of spirit stones, numbering at least hundreds of thousands; various rare medicinal herbs were neatly arranged on the jade shelves, among which the most eye-catching was a treasure that was entirely blood red and shaped like a lingzhi mushroom.

"A top-grade thousand-year-old blood mushroom!" Chen Feng's eyes flashed with a sharp light; this was his main objective for this trip.

After storing the spirit stones and blood mushrooms in his storage ring, Chen Feng returned to the ground and deactivated the Heavenly Net Formation.

The trapped high-ranking experts immediately surrounded them, but seeing that their city lord had already been defeated, none of them dared to make any rash moves.

"Lord of the Ancient City, thank you for your gift." Chen Feng cupped his hands in thanks, then leaped into the sky and disappeared into the horizon in the blink of an eye.

However, Chen Feng secretly transmitted his voice to Gurman: "Stay in the city lord's mansion, everything as usual. We will act together after the ancient ruins are opened."

In a cave a hundred miles away from Blood Rainbow City, Chen Feng sat cross-legged, with the thousand-year-old Blood Fungus floating in front of him.

The blood mushroom exudes a rich bloody aura and a faint fragrance; just one whiff is enough to make one's blood surge.

"Begin refining." Chen Feng formed hand seals, and streams of true energy enveloped the Blood Mushroom, beginning to extract its essence.