The Blood Burning Seal was not an independent combat skill, but a high-tier technique for utilizing one’s Qi and Blood and Heart Fire after reaching Minor Achievement in the Hundred Refinements Melting Furnace.

Its core lay in forcing one’s Qi and Blood out of the body, then using one’s Spiritual Will to draw upon the Heart Fire in the Dantian and ignite it instantly. This created a unique flame, born from the spirit influencing physical reality.

This flame could be used for ranged attacks or be attached to one’s fists, feet, and weapons, greatly enhancing their lethality.

"This is it!"

A sharp glint flashed in Xu Wuyi’s eyes.

He possessed the Nine-Turn Heart Fire, so his control over it far surpassed others of his rank. Furthermore, he bore the True Intention of "Incineration," making him a natural fit for this flame-based ability.

He got right to it.

He stood up, took a deep breath, and, following the technique’s instructions, circulated the vast Qi and Blood within his body.

HUMMM!

A mass of dark red Qi and Blood was slowly forced out from the center of his right palm. It hovered like a viscous liquid about an inch above his skin.

This step wasn’t difficult. Any Martial Artist with a decent level of control over their Qi and Blood could manage it.

The next step was the crucial one.

He sank his consciousness into his Dantian, communing with the steadily burning, dark-gold Heart Fire.

He separated a tiny wisp of the flame, guiding it silently up through his meridians until it finally reached his palm.

’Burn!’

Xu Wuyi roared inwardly, his Spiritual Will highly concentrated as he guided the wisp of Heart Fire to make sudden contact with the hovering Qi and Blood!

TSSS—!

A faint pop echoed.

The mass of dark red Qi and Blood in his palm was suddenly ignited, transforming into a fist-sized, restlessly dancing, dark-gold flame!

An aura of scorching heat and destruction instantly filled the air, and the temperature in the Cultivation Room rose sharply.

However, the flame seemed extremely unstable. Its edges flickered, as if it might dissipate at any moment.

Xu Wuyi could feel that maintaining this flame required a constant drain of his Qi and Blood and Spiritual Power, and demanded an extremely high level of control.

He tried to push it forward.

The flame wobbled two or three meters forward, tracing a faint golden line in the air, then dissipated with a soft PUFF, leaving only a scorched smell behind.

’A failure.’

Xu Wuyi was not discouraged.

To succeed in igniting and briefly maintaining it on the first try was already proof of his talent and his affinity for this technique.

The problem lay in the precision of his control and the ratio of Qi and Blood to Heart Fire.

He once again circulated his Qi and Blood and drew upon his Heart Fire.

Once, twice, three times...

Inside the Cultivation Room, the dark-gold flame flared to life and died out, again and again.

Sweat soon soaked his training clothes, and the drain on his Spiritual Power was immense.

But he was tireless, completely absorbed in the process.

With every failure, he carefully studied the subtle changes as his Qi and Blood merged with his Heart Fire, adjusting the output of his Spiritual Power and searching for that delicate point of balance.

Time flew by as he practiced with intense focus.

After an unknown amount of time, he once again succeeded in forming the Blood Burning Seal. This time, the dark-gold flame no longer flickered but burned steadily in his palm, emitting a constant yet restrained heat.

’Success!’

Xu Wuyi felt a flicker of joy.

He could feel that he had established a stable connection with the flame, able to control it as if it were an extension of his own body.

With a thought, the flame obediently floated up and began to circle his body slowly, leaving a trail of fine golden specks of light.

He tried attaching it to a nearby alloy dumbbell.

The flame, as if it had a life of its own, spread rapidly and enveloped one end of the dumbbell.

To his surprise, the flame didn’t rapidly heat the dumbbell until it was red-hot and melting, like a normal fire would.

It burned "quietly," hardly making a sound.

But Xu Wuyi could clearly sense that under the flame’s heat, the dumbbell’s metal structure was being slowly destroyed and broken down by a strange power.

’It wasn’t melting from the heat. It was more like... "incineration" on a conceptual level?’

He withdrew his Spiritual Power, and the flame slowly died out.

The burned section of the dumbbell was left with a dark gray mark. When he pinched it, the metal crumbled into a fine powder and sifted away.

"This..." Xu Wuyi observed the mark carefully, his brow slightly furrowed.

The behavior of this Blood Burning Seal flame seemed different from what he had expected, or rather, from the typical effects described in the Cultivation Technique.

The Cultivation Technique mentioned that the nature of the Blood Burning Seal’s flame was closely related to the Cultivator’s own will and the True Intention they had comprehended.

Some were fiery and explosive, detonating on contact. Some were insidious and bone-corroding, specializing in breaking through Protective Gang Qi. Others were like a cancer clinging to the bone, difficult to dispel.

His flame, on the other hand, didn’t seem to have strong direct destructive power; at least, its burning speed wasn’t fast.

But it possessed an extremely tenacious characteristic.

Once it touched something, it was incredibly difficult to extinguish, as if it would never rest until its target was utterly incinerated.

Moreover, this incineration wasn’t burning in the ordinary sense; it was about destroying the very internal structure of matter.

’Is it because of my "Incineration" True Intention?’ Xu Wuyi wondered thoughtfully.

His will—"a brilliant sun to wash away all injustice"—was reflected in this flame, transforming into this persistent trait of "burning until nothing remains."

It might not be explosive, but its unyielding tenacity, a profound quality that seemed etched into the very marrow, was enough to give any opponent a massive headache.

For the next few days, Xu Wuyi focused his training entirely on mastering and deepening his understanding of the Blood Burning Seal.

He constantly practiced the speed of its formation, the distance of his control, its changing forms, and the technique of imbuing it onto his long spear.

He discovered that imbuing the flame of the Blood Burning Seal onto his Meteor Iron Long Spear greatly enhanced its destructive power.

This was especially true against Star Beasts with formidable defenses or Martial Artists who cultivated Body Protection Techniques. The flame’s "incineration" property could continuously erode and destroy their defenses until they were completely broken.

During this time, he also re-entered the Battle Network to test the effects of the Blood Burning Seal in actual combat.

At first, he still lost more than he won. Forming the Blood Burning Seal took time and controlling it occupied his Heart and Spirit, which easily became an opening for his opponents in the rapidly changing battles.

But he persisted in using it, learning from each failure to improve his timing and methods of deployment.

Gradually, the situation began to improve.

When he could stably form the Blood Burning Seal within a second and control it with ease for simple attacks and imbuing, the tide of battle began to turn.

A Sixth-Rank Martial Artist, renowned for his powerful defense, relied on his abundant Protective Gang Qi to take a spear strike from Xu Wuyi that was imbued with the Blood Burning Seal.

At first, he only felt his Qi and Blood churn and his Protective Gang Qi dim slightly. He hadn’t suffered any serious injuries and was about to counterattack.

But soon, he discovered in horror that the dark-gold flame was stuck to his Gang Qi like a maggot on a bone. No matter how he circulated his Qi and Blood to try and extinguish it, it was useless!