There was the Yang Fire, hot enough to burn Immortals, and also the Yin Fire, cold enough to freeze Immortals to death alive.
If one could successfully endure the Yin and Yang Fire Calamities, their mana would transform, achieving the realm of an Earth Immortal!
"Speaking of the Yellow Sand Realm, there have been rumors of immortals dying from extreme heat and cold... it might really be the place of the Yin and Yang Fire!"
After a pause, Su Xing muttered,
"However, to endure the Yin and Yang Fire, one needs enough comprehension of the Great Dao of Fire or the corresponding elixir to resist the burning flames..."
"This simulation may not allow a complete passage, but I can explore ahead of time to accumulate experience..."
Thinking this, Su Xing set his eyes on the simulation panel.
[Knowing the anomaly in the depths of the desert, you decided to explore it yourself.]
[After traversing countless dunes, you finally reached the vicinity of the forbidden zone in the desert where it's said even Human Immortal cultivators were burned to death.]
[What surprised you was that even a hundred miles from the destination, you felt an unbearable heat.]
[Your face slightly changed, realizing the rumors were not entirely false. Such extreme temperature was nearly impossible to naturally occur in the mortal world...]
[Thus, you ventured forward for several dozen miles more, finally stopping ten miles from the destination.]
[At this moment, the air around you twisted due to the heat, and the sand within sight turned into flames. The extreme heat made it hard even for you to bear.]
[It should be noted that you had achieved the second layer of the Grand Witch Body Refinement Decision, and your physical body had far surpassed Human Immortal realm cultivators, yet it was still challenging to endure.]
[This indicated that extraordinary phenomena indeed occurred here...]
[In your Divine Sense, within ten miles ahead, you sensed a basin that felt like a blazing fireball, capable of incinerating all things...]
[You didn't rush forward but waited quietly ten miles out until the sun slowly set...]
[When the sun dipped behind the mountains and the moon rose high, you noticed the surrounding temperature plummeting rapidly...]
[In the blink of an eye, it dropped to twenty or thirty degrees below zero.]
[The drastic temperature change made you feel something amiss.]
[Thus, you proceeded further, but the closer you got, the more irregular the temperature became...]
[Your Divine Sense reached into the area ten miles ahead. The area blazing hot like flames during the day now turned into ice, as cold as a millennium chill, causing skin and bone to shiver.]
[Your heart skipped a beat, realizing this was indeed the place of the Yin and Yang Fire!]
[Moreover, it was extremely rare for Yin and Yang Fire to originate from the same source!]
[Because of this, the place became a forbidden zone in the Yellow Sand Realm, where even Immortals struggled to survive!]
[For you, however, it was a natural and perfect spot to endure the Yin and Yang Fire calamity, ascending to the Earth Immortal realm!]
In the real world, Su Xing finally confirmed that the Yellow Sand Realm could indeed help him ascend to the Earth Immortal realm, bringing instant joy to his heart.
"For ordinary peak Human Immortal cultivators, finding a place to endure the fire calamity might take hundreds of years."
"I didn't expect to find it so quickly. My luck must be extraordinary!"
Su Xing felt good. This mysterious area within the desert undoubtedly saved him much time.
"And the place of the thunder calamity, the giant beast's abdomen should meet the conditions!"
"That means, for the three disasters of Immortals, I only need to find the place of the final wind calamity, and everything will be perfect!"
After a pause, Su Xing murmured,
"However, before enduring the Yin and Yang Fire calamity, my comprehension of the Great Dao of Fire needs further improvement, ideally reaching the realm of initial insight, and with the aid of the Yin-Yang Dan, I can pass it with absolute certainty!"
The comprehension of the Great Dao of Fire needed no further explanation.
As for the Yin-Yang Dan, it was specially prepared for enduring the Yin and Yang Fire.
It could help refine the vital organs more effectively under the Yin-Yang Fire!
However, the elixir was quite valuable, and for Su Xing to refine it might require considerable effort.
"But... It may not be necessary to refine the Yin-Yang Dan myself."
Su Xing stroked his chin, recalling how "Blood Nine" had spent hundreds of years collecting resources to break through to the Earth Immortal realm, his cultivation halting at the peak Human Immortal realm.
Maybe Su Xing could find a ready-made Yin-Yang Dan on him!
"Heh, there's nothing better than taking elixirs made by others!"
Su Xing muttered, with a plan forming in his mind.
He set his eyes on the simulation panel.
[Confirming that the depths of the desert were the Yin and Yang Fire place you sought, you returned to Yellow Sand City and focused on cultivation.]
[Thus, thirty years slowly passed...]
[In the one hundred and thirtieth year, these thirty years saw great progress in the second layer of your Grand Witch Body Refinement Decision, but reaching the realm of minor achievement still required a very long process.]
[One day, your talent for avoiding calamities sent you frantic warnings...]