Ling Feng stood up, when he was about to put twenty pills into the Mixed Yuan Ring, suddenly the sky above Ling Feng changed, a dark cloud formed above his head, and soon surrounded Ling Feng, the entire cave roof was covered with dark clouds, with the roar of thunder and lightning, it looked very terrifying!

"I didn't expect that there would be a Dan Thunder Tribulation! It's incredible!" Ling Feng said lightly, he didn't expect that this alchemy would actually trigger the Dan Thunder Tribulation, these twenty pills have not yet reached the point of supergrade, according to reason, there will be no Dan Thunder Tribulation, and Ling Feng doesn't understand why!

And the elixir that produces the Dan Thunder Tribulation must pass the Dan Thunder Tribulation to be considered alchemy, otherwise, the elixir will be wiped out under the thunder and lightning of the Dan Thunder Tribulation and cease to exist!

"What's going on?" Hu Hanwu said very suspiciously, and several of them looked at the Dan Thunder Tribulation in the sky above Ling Feng!

"If I'm not mistaken, this is the legendary Dan Lei Tribulation, and it's the first time I've seen it!" Li Youzhen said suspiciously!

"It's impossible, it is said that only the best pills will appear Danlei Tribulation, and I still heard from my grandfather, the best pills have not appeared in Shushan for hundreds of years!" Yan Ruyu said very surprised!

In their eyes, in the entire Shu Mountain, and even in the entire Huaxia, alchemists are very rare, and their skills are even more difficult for Ling Feng to think of, let alone be able to refine the best elixir, and it has also triggered the Dan Thunder Tribulation!

They couldn't believe it, and at this time, the thunder and lightning had already fallen, and the entire twenty thunderbolts rushed directly towards the twenty pills, and the whole air was filled with the smell of thunder and lightning!

However, this first thunderbolt did not have any impact on the pill at all, the Dan Thunder Tribulation was very powerful, there were a total of eight thunderbolts, the power of each one would be strong, and the eighth was a combination of the previous seven thunderbolts!

And Ling Feng didn't make a move, he just stood aside and watched quietly, he believed that the pill he had refined could resist the Dan Thunder Tribulation, if he couldn't even withstand the Dan Thunder Tribulation, it meant that this pill had too many flaws!

For Ling Feng, what he wanted had to be the most perfect, the best, without a single flaw, and as he spoke, a second lightning bolt had already fallen!

"Boom!" The pill was still intact, there was nothing at all, but the entire alchemy room was filled with thunder and lightning, and then the thunder and lightning began to fall rapidly, the third, fourth, fifth, and until the sixth way, a pill was directly destroyed under the bombardment of thunder and lightning!

There were only the last two thunderbolts left, Ling Feng was still standing there, he didn't want to go up to help at all, Jian Nanfeng and the others sweated for the remaining pills, it was also the first time they saw the Dan Thunder Tribulation, and they didn't know how to help at all!

And the last two thunderbolts in the air are merging, forming the most powerful thunderbolt, and the entire heaven and earth are filled with terrifying coercion!

Seeing this scene, the four of them were very surprised, they didn't know if these pills could withstand it, but Ling Feng was not worried, the best elixir was also a elixir, why was it called a elixir, because they had already produced spirituality, so they would not be afraid of this last Dan Thunder Tribulation at all!

The remaining nineteen pills gathered together and formed a ball, and the pill qi also wrapped these pills, which looked very shocking!

The last thunderbolt has been accumulated and will be ready to fall at any time!