Start from Panlong and kill through the heavens

The Medicine King Valley herb garden also exists in another void, and the cave mentioned by the Gu Saint is hidden deep within the void.

Dark gold runes flowed across the surface of the cave's stone gate, and every crack emanated fluctuations that distorted space.

The black-robed elder, the Gu Saint, placed his right hand on the sealing array's eye, and his bluish-gray battle qi condensed into thousands of poisonous Gu worms that gnawed at the barrier.

The moment the seal shattered, the fragrance of grass, trees, and springs accumulated over millennia rushed towards us.

The tips of the stalactites hanging from the cave ceiling, condensed with emerald-colored spiritual liquid, bloomed into lotus shapes in mid-air as they fell into the spiritual spring below, which was shrouded in blue mist.

The flames suspended at the deepest part resembled burning liquid jade, with dark gold ancient runes flowing around the emerald core.

Every pulsation of the Flame Heart transforms into different spiritual plant forms, sometimes unfurling a nine-leafed vermilion fruit, sometimes unfurling dragon blood vines.

The moment the flames licked the moss on the cave wall, the moss miraculously grew into a thousand-year-old Ganoderma lucidum in the blink of an eye.

"It is actually the Flame of Life that can give birth to all things." The old man's voice was hoarse, shrouded in poisonous mist. Several jade centipedes crawled out from under his black robe, but the moment they touched the flames, they transformed into a strange species with wings on their backs.

Rean gazed at the occasional white phantoms that condensed in the flames, his pupils reflecting the countless spirit seeds flying everywhere—wherever a spark landed, a tender sprout pushed through the soil formed from the crystal.

The strange fire was surrounded by a three-foot-thick layer of azure jade spirit mist, within which flickered fire spirits the size of a thumb, and wherever they passed, clusters of seven-colored coral-like crystals emerged from the cracks in the rocks.

The bluish-green flames flickered in the void, like the first tender buds sprouting in early spring.

This cluster of life-giving flames, no bigger than the palm of a hand, caused all the withered trees within a ten-foot radius to sprout new green leaves.

At the heart of the flame, an amber halo condensed, and with each flicker, it scattered emerald-like sparks, which transformed into plant spirits entwined with spiritual mist upon landing.

A semi-transparent phantom of a girl floats above the flames, with almond-shaped eyes that shimmer beneath her willow-leaf eyebrows, and tiny wood spirit runes fluttering in her eyelashes.

Flowering vines twined in her hair, and two delicate, fairy-like leaves adorned her earlobes, which would unfurl with her breath.

When the phantom reached out and touched the scorched earth, trembling bluebells immediately sprouted from the cracked ground, with unburnt blue embers still dancing in their stamens.

The strangest thing is that within a three-zhang radius of the flames, all the weapons are covered with emerald green rust spots.

This wondrous strange fire truly lives up to its reputation as the fifth-ranked strange fire on the list. Not only has it developed sentience, but it has also taken on a human form, making it incredibly powerful.

Rean already possesses two different flames, and he forcibly fused them together using their unique properties. However, the difficulty of fusing a third flame is unimaginable.

Gu Sheng clearly knew that Li En wanted to fuse with the Flame of Life. In order to repay Li En for helping him break through to the Dou Sheng realm, he spared no effort to help Li En seal the Flame of Life, allowing Li En to successfully take it away.

However, Rean also knew that it would not be easy to fuse with the Flame of Life, so he couldn't help but think of a powerful cultivation technique—the Burning Technique.

He learned from the Pill Tower that the whereabouts of the Burning Technique seemed to be in the herb garden of Medicine King Valley. Therefore, after obtaining the Flame of Life, he chose to stay in the herb garden to search for the legendary secret technique.

He stayed in the herb garden for more than two months, searching through many ancient caves, and finally found the scroll containing the Burning Technique in a Crimson Flame Cave.

The initial Burning Technique was only a low-level Yellow Rank technique, but it could evolve infinitely by devouring different flames, including beast flames, though the effect was not as good as different flames. Eventually, it could even surpass the Heaven Rank.

This technique has a drawback. On the one hand, it involves devouring different flames to evolve, which is extremely difficult and dangerous. If you are not careful, you will be burned to death by the flames.

On the other hand, cultivating this secret technique requires abolishing the original secret techniques and battle qi. However, this is nothing to Rean, as the battle qi he uses now is evolved from the power of the world.

In other words, he had never cultivated the fighting spirit and secret techniques of this world, so naturally he didn't need to abandon his original secret techniques and fighting spirit.

Thus, he successfully cultivated the Burning Technique without any difficulty. Moreover, because he had already devoured two different kinds of strange fire, he directly upgraded the Burning Technique to the middle level of the Earth Rank.

Then he devoured the Flame of Life, raising the Burning Technique to the Quasi-Heaven level in one fell swoop. His strength also broke through to the Dou Zun level because of the Flame of Life.

Thus, a Dou Zun powerhouse, only forty years old, was born.

Most importantly, he fused three different flames, possessing an extremely terrifying power that allows him to fight even a mid-stage Dou Zun.

After leaving the herb garden, Li En returned to Medicine King Valley and continued searching for ninth-grade medicinal herbs with the Medicine Fairy. He wanted to refine ninth-grade pills to quickly improve his strength.

With his current understanding of the laws, he has already reached the level of a top-tier universe venerable, which is the peak of Dou Zun, or even the level of a half-step Dou Sheng.

In other words, he will not encounter any bottlenecks before reaching the half-step Dou Sheng level; he only needs to continuously accumulate energy.

With the help of the Medicine Fairy's innate abilities, Rean found all the medicinal materials needed to refine the ninth-grade elixir, the Heaven and Earth Spirit Pill, except for one main ingredient.

Grade 9 medicinal herbs, such as the Heaven and Earth Spirit Root, are extremely rare and only exist in some extremely dangerous places. Rean and the Medicine Fairy traveled all over the Medicine King Valley before finding one in the Extreme Cold Abyss.

The Heaven and Earth Spiritual Root is pure white like jade, with its main trunk winding like a coiled dragon, and its surface covered with fine ice crystal patterns.

The three rhomboid leaves are as thin as cicada wings, with pale blue elixir flowing through their veins, shimmering with a hazy glow in the wind and snow of the frigid land.

Its roots are translucent, like a spider web carved from crystal, deeply embedded in the ancient ice layer, and with each breath, it creates tiny vortexes of ice mist around it.

Nine naturally formed golden lines grow at the stem nodes, which correspond to the ultimate numbers of the heavens. When the aurora passes by, they refract a rainbow of colors.

Rean, relying on the power of the three different flames and the special nature of the Burning Technique, forcibly suppressed the cold air in the Extreme Cold Abyss and obtained the spiritual root of heaven and earth.

After obtaining the Heaven and Earth Spiritual Root, Rean and the Medicine Fairy returned to the Medicine King Valley headquarters and, with the help of the Medicine King Valley's formation, began to refine the ninth-grade elixir, the Heaven and Earth Spiritual Pill.

The air in the alchemy room was as still as lead, and Rean's fingertips trembled slightly the moment they touched the cauldron.

The blue flame inside the cauldron flickered, making the beads of sweat on his forehead look like poisoned silver needles.

As soon as the three-thousand-year-old Xuanbing Grass was put into the cauldron, it exploded into a string of dark blue ice flowers, and the medicinal liquid instantly condensed into spider web-like crystals.

He bit his tongue hard, spitting his blood onto the violently trembling cauldron. The stench of blood mixed with the crackling sound of ice crystals bursting spread through his throat.

When the seventh main ingredient, the Nine-Aperture Exquisite Fruit, was ground into golden powder, the entire medicine cauldron suddenly emitted a humming sound like a dragon's roar.

Rean's pupils reflected the colorful light gushing from the cauldron's mouth, and his fingernails had already dug into his palms from clenching his fists too tightly.

He suddenly plunged his entire left arm into the flames. Amidst the sizzling sound of burning flesh, the ancient cinnabar patterns engraved on his arm bones lit up one by one, forcefully suppressing the rampaging medicinal spirit back into the cauldron. (End of Chapter)