The Ice and Fire Yin Yang Well is both a treasure trove where spiritual energy converges and a forbidden zone permeated with toxic miasma.
The miasma here is unique; even a Title Douluo skilled in the use of poison, such as Dugu Bo, would not dare to linger for too long.
An average soul master, unprepared, would likely be done for before even reaching the valley, let alone climbing the mountain.
When Ling Feng first arrived, he had to prepare antidotes in advance just to endure the environment for a short while.
Therefore, he had no reason to worry about this place being discovered by others.
"So many spiritual herbs!" Bibi Dong stared in shock at the medicinal plants surrounding the Ice and Fire Yin Yang Well.
Even in the medicinal gardens of Spirit City, Bibi Dong had never seen so many aged spiritual herbs.
Due to the suppression of the miasma, these spiritual herbs struggled to evolve into soul beasts, even if they had reached a sufficient age.
"There are not only spiritual herbs here but also poisons. Don't touch them randomly, or you might get poisoned!" Ling Feng warned.
He was immune to all poisons, but Bibi Dong was not; even after consuming his blood, she could only resist the local miasma.
If Bibi Dong were to touch those thousand-year or ten-thousand-year poisonous plants recklessly, she certainly would not be able to withstand them.
In truth, Ling Feng did not recognize all those poisonous plants either, but his immunity allowed him to test them and categorize them accordingly.
"Alright, I won't touch them randomly!" Bibi Dong promised.
In reality, Bibi Dong felt deeply satisfied that Ling Feng was even willing to bring her here.
Such a secret treasure land was incredibly precious to any soul master.
Even if a soul master had no use for these spiritual herbs and poisonous plants, they could be sold for money or exchanged for other cultivation resources.
Ling Feng first harvested the immortal herbs he recognized, placing them into pre-prepared containers before storing them in his soul tool.
Except for the Love-Sickness Heartbroken Red, which was difficult to store, the other immortal herbs were all harvested.
Once the immortal herbs were collected, Ling Feng began to gather the spiritual herbs and poisonous plants that were over ten thousand years old.
Those that did not poison him were classified as spiritual herbs, while those that poisoned him but were subsequently neutralized by the miniature Ice and Fire Yin Yang Well within his body were classified as poisons.
Ling Feng sorted the poisons and spiritual herbs, intending to study them carefully after returning.
Before long, Ling Feng had cleared out all the spiritual herbs over ten thousand years old.
He left the younger ones behind, effectively leaving them to propagate.
After finishing, Ling Feng walked up to a pitch-black stone.
This stone was known as the Wu Jue Black Stone; it was entirely black and possessed a heavy texture.
Growing from the bare stone was a flower without leaves—a solitary, stark white stem topped with a single large bloom.
The flower was the size of a palm and resembled a white peony, its petals possessing the texture of mutton-fat jade.
Sparse, blood-red spots on the petals made the flower appear even more eerie.
This was the Love-Sickness Heartbroken Red, the King of Flowers and the finest among immortal herbs.
It emitted a faint, elegant fragrance, growing lonely upon the black stone, standing aloof from the world as if waiting for a companion to return.
"Bibi Dong, come here quickly!" Ling Feng called out.
"What is it?" Bibi Dong walked curiously to Ling Feng's side and saw the flower before him.
Seeing the great importance Ling Feng placed on this flower, she knew it was no ordinary plant.
"Bibi Dong, this flower is called the Love-Sickness Heartbroken Red. It is the King of Flowers, an immortal treasure."
"Consuming this flower can increase your soul power by ten levels and grant you a chance to bring the dead back to life and restore flesh to bones."
"No matter how severe your injuries are, as long as you have a single breath left, this flower can save you."
Bibi Dong was incredibly astonished as she listened to Ling Feng's description of the flower.
Ten levels of soul power would take even her two or three years of cultivation to achieve.
Bibi Dong trusted Ling Feng implicitly; even though this Love-Sickness Heartbroken Red far exceeded her understanding, she believed the flower was real.
"Since the effects of the Love-Sickness Heartbroken Red are so powerful, Ling Feng, you should eat it quickly! Wouldn't that allow your soul power to catch up to mine?"
Bibi Dong urged Ling Feng to consume the Love-Sickness Heartbroken Red.
Ling Feng shook his head and said, "Bibi Dong, I have actually already consumed an immortal herb; eating this one would be a waste."
"This immortal herb is actually prepared for you."
"We are going to the Capital of Slaughter for training, and we can't afford to have low soul power!"
"For me?" Bibi Dong felt a surge of emotion. Ling Feng was willing to give her such a miraculous immortal herb?
Ling Feng nodded and said, "That's right, try it out."
"This immortal herb has a spirit of its own; you must make it recognize you as its master before you can absorb it."
"If you force it to be picked, its medicinal power will dissipate, and it will lose all its efficacy," Ling Feng reminded her.
"So this is what an immortal medicine is? No wonder it has such terrifying effects," Bibi Dong exclaimed in wonder.
"Then, how do I make it recognize me as its master?"
Ling Feng smiled and said, "Think of my face, then force a drop of your heart's blood onto it."
"If your love for me is true, then this King of Flowers will acknowledge you as its master!"
Bibi Dong thought Ling Feng was testing her, so she hurriedly asserted, "Of course my love for you is true!"
"Just wait, I will definitely make this King of Flowers acknowledge me as its master!" Bibi Dong said.
She gazed at Ling Feng with deep affection, thinking of their future together, then used her soul power to force out a drop of heart's blood and spat it onto the petals.
The heart's blood looked like a red speck on the petals, making the immortal herb appear even more bewitching.
The Love-Sickness Heartbroken Red swayed, its roots automatically detaching from the Black Absolute Stone, and it drifted down slowly.
Bibi Dong immediately felt a mysterious connection form between herself and the flower.
This method of acknowledging a master is actually real? I really have become the master of this flower? Bibi Dong thought to herself.
She picked up the Love-Sickness Heartbroken Red and waved it in front of Ling Feng.
"Ling Feng, look, I succeeded! You should believe now that I truly love you, right?"
Ling Feng nodded and said, "Mm, I have always believed it, otherwise I wouldn't have let you come to pick this flower."
"Hurry and consume this immortal herb; I will stand guard for you!"
"This immortal herb also has the effect of strengthening the body, which will be beneficial for you when absorbing your fifth soul ring!" Ling Feng said.
In her eyes, this flower was equivalent to a token of love between her and Ling Feng, so Bibi Dong was somewhat reluctant to eat it.
However, thinking of her future with Ling Feng, she still decided to consume the immortal herb to improve her strength as quickly as possible.
"Alright, I will consume it now!" Bibi Dong said.
Having consumed Ling Feng's blood, she was not afraid of the poisonous miasma here, so she found a stone platform and sat upon it to consume the immortal herb.
Ling Feng walked over to the side of the pool and took out some specially crafted Yin Yang Jade Bottles.
These jade bottles could hold the Cold Spring on one side and the Sun Spring on the other, keeping them in a state of yin-yang balance so they would not shatter.
At a critical moment, they could be used as a secret weapon.
If one could force this substance into an opponent's body, even a hundred-thousand-year soul beast could not withstand it, let alone other enemies.
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