Battle Through the Heavens: Harmony of Flame and Shadow

After a long time, the storm of power in the void began to dissipate and everything became clear. It was seen that the Destruction Light Stream had somehow vanished without a trace. 

Only a magical scroll emitting a mysterious aura stood silently in the void, flickering with an eerie radiance. 

"What a strange power!" Lin Dong frowned as he looked at that magical scroll. He sensed extreme evil as well as extreme light emanating from it. Two opposing forces existed in one person, which was quite bizarre.

"Looks like I have the upper hand!" Saint Demon Emperor smiled faintly. Then he flicked his fingers, and the magical scroll in the void turned into a stream of light, covering toward Lin Dong.

"Eight Ancestors Glazed Bowl!"

As the scroll moved, Lin Dong's expression changed. Eight ancient runes gathered in his palm and finally merged to form an ancient glazed bowl, which had thunder, flames, and ice flowing around it. 

With a loud shout, the glazed bowl shot into the sky, transforming into a huge cover that directly enveloped Lin Dong. 

This glazed bowl, both offensive and defensive, was a rare sacred object!

"Bang!"

The magical scroll and the glazed bowl collided in the void, destroying an area of the void, and severing all life within. 

At the same time, Saint Demon Emperor moved toward Lin Dong. Behind him, a pair of demon wings suddenly appeared, surrounded by a black and white demonic flame. He vibrated his demon wings, turning into a shadow, and instantly appeared in front of Lin Dong.

In the opponent's surprised gaze, Saint Demon Emperor clawed toward his heart. In a flash, the hand surrounded by demonic flames easily penetrated through Lin Dong's layers of spiritual shields.

"Immovable Azure Dragon Bell!"

In the moment of life and death, Lin Dong responded quickly. As Saint Demon Emperor approached, he formed seals with his hands, like a dragon head. A brilliant azure light flowed like a tide from his body. 

The overwhelming azure light spread around Lin Dong, forming a huge azure dragon shadow. A terrifying pressure emanated from it.

"Roar!"

The giant azure dragon suddenly roared at the sky, its dragon roar turned into a tangible sound wave spreading madly. Unfortunately, this had no effect on Saint Demon Emperor.

In the blink of an eye, as Saint Demon Emperor's palm was about to pierce through Lin Dong's body, the giant azure dragon instantly bent down, coiling around his body.

At that moment, the azure light spread from the dragon's body, forming a giant azure dragon clock. The clock shone with azure light, dragon patterns appeared on it, and it was covered with azure dragon scales. An ancient and majestic aura spread rapidly from it.

"Bong!"

In an instant, a clear bell sound seemed to echo through the entire world, and all the spiritual power in the heavens and earth exploded...

"Bang!"

With a loud bang, the azure dragon clock shattered, and Lin Dong spat out a mouthful of blood, flying backward. 

"Devil's Domain!"

During his backward flight, the surrounding void turned into a pitch-black devil domain in an instant. 

The spiritual power in the devil domain was driven out and polluted, turning the blue sky into gray-white, and the earth into a lifeless land filled with endless demonic energy.

In just a few breaths, the surrounding hundreds of thousands of miles of land turned into an evil demonic land and quickly spread outward.

"Haha, Lin Dong, you are fated with my clan. Accept purification and become part of my sacred demon clan!"

"Whoosh!"

Like a meteor burning with flames, something penetrated the space and landed directly in front of Lin Dong. 

Flames spread, revealing a huge black ruler burning with fierce flames, vaporizing all the surrounding demonic energy.

At the same time, a slightly lazy voice suddenly echoed in this world.

"Isn't it too early for you to be happy?"

As this voice resounded, endless flames rolled out of the void, covering the entire continent with a terrifying temperature.

"Indeed, your style!" Saint Demon Emperor glanced at the torn void and stopped chasing Lin Dong, standing with his hands behind his back, a faint smile on his lips.

"Tear!"

The void was torn apart, and endless flames roared out. These flames were extremely gorgeous but also exuded a chilling and dangerous aura.

However, as the flames approached the range around Saint Demon Emperor, they seemed fearful and hesitant.

Meanwhile, a tall figure stepped out from the sea of flames. Each step made the space tremble slightly, as though it could not bear his presence.

It was a man dressed in black. He was tall with a lazy smile on his face, and flames burned brightly on his body, making him look like a fire god, full of mysterious pressure.

However, at this moment, Xiao Yan frowned as he looked at the sacred flame, which did not dare to advance within ten thousand feet of Saint Demon Emperor.

"Swoosh!"

In a single step, Xiao Yan appeared beside Lin Dong, frowning as he looked at his injuries.

"Brother Xiao…"

Seeing him, Lin Dong forced a smile.

"Sorry for being late, Brother Lin," Xiao Yan said, feeling guilty. He flipped his hand, and a pill emitting a strong fragrance appeared. Under Lin Dong's grateful gaze, he fed it to him.

The pill worked instantly, and Lin Dong's injuries healed quickly. He stood up.

"Thank you for saving me, Brother Xiao!" Lin Dong clasped his hands in gratitude.

"Can you still fight?" Xiao Yan asked, looking toward Saint Demon Emperor.

"Hahaha, it's an honor to fight alongside Brother Xiao!" Lin Dong laughed and stood beside Xiao Yan.

Over the decades, the two established their own factions at the borders of the Great Thousand World - the Endless Flame Alliance and the Martial Realm, restraining the extraterrestrial evil races. Although they seldom met, they appreciated each other.

Xiao Yan stared at Saint Demon Emperor with a serious look. Only by facing him directly could he feel the terrifying pressure.

"Ready?" Saint Demon Emperor asked casually, still composed.

Even a casual remark heightened Xiao Yan and Lin Dong's vigilance.

"Saint Demon Emperor, you are indeed powerful. However, this is the heartland of the Great Thousand World. If Brother Lin and I can hold you for a while, the top powerhouses like Dragon Phoenix, Undying Lord, Devouring Serpent, and Qin Tian will arrive. You may not leave here unharmed." Xiao Yan stretched out his hand, and the heavy ruler on the ground flew into his grip, pointing at Saint Demon Emperor.

Lin Dong remained silent, but his Lightning Emperor Staff shone brilliantly, indicating his stance.

"Then, let's test it!"

Saint Demon Emperor smirked, exuding a chilling aura. He leaped into the air, and the endless demonic energy formed a gigantic demon statue.

"Holy Spirit Demon Statue!" Saint Demon Emperor shouted, merging with the enormous statue.

Facing the more formidable Saint Demon Emperor, Xiao Yan and Lin Dong's eyes turned cold. This was a rare chance to strike at the heart of the extraterrestrial evil race. If they could suppress him, the enemy's momentum would wane.

Despite the danger, opportunities lay within risks. Neither Lin Dong nor Xiao Yan would easily admit defeat.

As they stepped forward, boundless spiritual energy gathered around them.

"Raging Flames Splitting Waves Ruler!"

Xiao Yan tightly gripped his ruler, unleashing flames that turned into a huge ruler light, slicing through the sky.

The ruler light split the heavens and the earth.

This move was a relic of Xiao Yan's youth, but at his current level, its power surpassed many ultimate techniques of the Great Thousand World.

"Eight Symbol Azure Dragon Fist!"

Lin Dong clenched his fist, and a dragon roar echoed. An azure dragon fist soared up, its mouth filled with eight-colored light, fierce and destructive.

"Holy Spirit Demon Flash!"

Facing their combined attack, Saint Demon Emperor laughed. The huge holy body opened a large eye on its forehead, shooting a destructive beam toward Xiao Yan and Lin Dong.

The beam, like a doomsday light, obliterated the void, its power so formidable that even top-tier demons would be gravely injured.

The three attacks met, not exploding but continually annihilating each other, creating a fearful wave that made even supreme beings tremble.

"Holy Demon Staff!" Saint Demon Emperor's statue wielded an ancient staff intertwined with light and darkness, looking both holy and sinister.

"Kill!"

Roaring, Saint Demon Emperor flashed forward, fiercely slamming the staff at Xiao Yan and Lin Dong.

"Ancient Eternal Fire Ruler!"

"Lightning Emperor Staff!"

Xiao Yan and Lin Dong reacted swiftly. Xiao Yan's palm ignited into a massive fire ruler, merging with his heavy ruler, emitting terrible waves.

Lin Dong's Lightning Emperor Staff exploded with lightning, and in a flash, he pierced the void, smashing the staff at Saint Demon Emperor.

"Clang! Clang! Clang!"

The clashing sounds echoed, followed by a storm-like impact that constantly collapsed the void, space fragments unable to withstand the shock, shattering.

Amidst the collapsing void, three figures clashed with breathtaking speed, each collision triggering destructive ripples.

Within minutes, the three exchanged over a thousand blows.

"Boom!"

In the void, the demon staff scattered into demonic light, clashing fiercely with the fire and lightning staffs. The energy ripples blasted the three figures away.

Recovering quickly, Lin Dong and Xiao Yan's faces darkened.

Even facing their combined assault, Saint Demon Emperor remained calm.

Xiao Yan's face grew icy. Taking a deep breath, he looked toward Lin Dong, saying, "This guy is too strong. We can't hold back."

Closing his eyes briefly, he reopened them, with flames burning fiercely in his eyes.

"Roar!"

The flames surged out, engulfing Xiao Yan's body. The vast spiritual sea behind him began boiling, and a massive fire lotus slowly rose.

The lotus was vibrant, each petal representing an otherworldly fire, exuding terrifying power.

Simultaneously, Lin Dong's Lightning Emperor Staff swirled with lightning. Stabbing it down, eight lightning dragons roared out, forming a colossal dragon.

"Boom!"

Countless demonic auras erupted from Saint Demon Emperor, each carrying a black and white holy demon flame akin to roaring demon dragons. In an instant, the auras veiled the world, making him seem like an apocalyptic demon god.

"Yin-Yang Doomsday Disk!"

With a heavy voice, Saint Demon Emperor fused the demon auras into a disk, black inside and white outside, emanating destructive waves.

As the energy converged, a fearful pressure permeated the land below, showing signs of collapse.

Yet, Xiao Yan and Lin Dong stood firm. 

In this crucial moment, the fate of the Great Thousand World hinged on their unyielding resolve.