Lin Yun took the box and observed it carefully, there were delicate patterns engraved on the surface of the box, and at the lid of the box, there were patterns engraved with formations, which seemed to seal something inside.

The box didn't know what kind of material it was made of, blocking Lin Yun's Heavenly Eyes and Soul Power.

And Lin Yun was not in a hurry, and began to crack the formation pattern above.

After only a quarter of an hour, the formation pattern was cracked.

But Lin Yun hadn't breathed a sigh of relief yet, and instantly felt that something was wrong.

In the cracks of the box, a wave of heat rushed out.

"Is there anything in there?"

Lin Yun immediately walked away from the box and said.

And at this time, the mixed spiritual fire in Lin Yun's body was still trembling slightly.

"Could it be that there is a strange fire inside?"

Lin Yun felt the trembling of the mixed spiritual fire in his body and said.

Then, Lin Yun's fingers moved slightly, and one after another formation patterns appeared, directly arranging a formation around the box.

Lin Yun, on the other hand, slowly retreated backwards, and after retreating to a safe distance, Lin Yun opened the box with his soul power.

"Crackle!"

As soon as the box was opened, a bolt of lightning appeared, followed by a red flame inside the box.

And the high temperature of this flame instantly turned the box into ashes, and the flame appeared in front of Lin Yun.

"Heaven and earth, earth and fire!"

Lin Yun looked at the red flame, surrounded by lightning, and recognized the identity of the flame at a glance and said.

This is the Heavenly Thunder and Earth Heart Fire that ranks thirty-first on the Heavenly Fire List.

Heavenly Thunder and Earth Heart Fire, as the name suggests, is a flame formed by the combination of Heavenly Thunder and Earth Heart Fire, generally when crossing the Heavenly Tribulation, in the Tribulation Cloud, endless lightning gathers, and a wisp of flame will appear.

This flame usually goes out very quickly, and if it does not go out and falls to the ground, it will gradually extinguish because there is no flame to provide energy.

Therefore, there is only one way, the place of the tribulation is in the volcano or the place where the fire aura is abundant, only in this way, this wisp of flame will absorb the fire aura and will not be extinguished, but it will slowly grow, but this is not enough, finally, this wisp of flame enters the volcano, along the volcanic passage into the interior of the earth, and in the center of the earth, this wisp of flame will continue to grow, and finally become the heavenly thunder fire.

It stands to reason that this is generally the case, and if this day the thunder fire finds a fire that is comparable to itself, it will merge with it, and finally become the fire of the thunder and the heart of the earth, this process is very critical, if the earth fire is weak, it will be swallowed by the thunder fire of the sky, and it cannot be fused, if the earth fire is strong, it will devour the thunder fire, so it must be equal, and the earth fire is already less, and then encounter a comparable one, it is even more difficult, on this difficulty, this flame is no less than the birth of the Nine Demon Flames.

And now, this thunder and earth heart fire is in front of him.

"Okay, after devouring this flame, my strength can be completely on the next level."

Lin Yun said.

But now is not the time to devour, although the hybrid spiritual fire in Lin Yun's body is much stronger than the Heavenly Thunder and Earth Heart Fire, but Lin Yun does not dare to take the risk, after all, it is a flame that combines the Heavenly Thunder and the Earth Fire, I don't know how much strength he has, but the lion fights the rabbit and uses all his strength.

And at this time, Tianlei and Earth Heart Fire stayed quietly in the formation, and there was no problem.

Then, after Lin Yun came out of the Great Dao Stone Plate, he flew towards the nearest city, he wanted to buy some ice attribute elixir and refine it into an elixir to suppress the heat of the Heavenly Thunder and Earth Heart Fire.

And Lin Yun also changed his appearance on the flying boat, in this way, coupled with the Isolation Jade Talisman, the people of the Divine Beast Clan would not recognize themselves at all.

When approaching the city, Lin Yun collected the boat and entered the city on foot.

And Lin Yun had a clear goal, and directly entered the largest chamber of commerce in the city.

"What do you need, this guest officer?"

A maid immediately came up to entertain Lin Yun.

"I need a lot of ice-attribute elixir, do you have it here?"

Lin Yun asked.

"Yes, please follow me to the third floor."

The maid said.

Lin Yun nodded, followed the maid up to the third floor, and entered a room.

And in this room, there are countless ice-attribute elixirs.

Because there are not many people cultivating the ice attribute, there are no one here either.

"How much do you need for the guest officer?"

The maid asked.

"I want them all."

Lin Yun said.

"Okay, guest officer, what, everything!"

The maid reacted and said.

"Yes, I want it all, put it away for me, and settle the bill."

After Lin Yun finished speaking, he left the room directly, leaving the maid in the room with a confused expression.

But the efficiency was still good, and after a while, a storage ring was delivered to Lin Yun's hand.

"Guest officer, it's all here, you need to pay, a total of 200 million Lingyuan Pills."

The maid said.

Lin Yun took the storage ring, looked at the elixir inside, nodded with satisfaction, and directly put a storage ring on the table.

"Click on it."

Lin Yun said.

The maid picked up the ring and looked inside, and the Lingyuan Pill full of it made her trance.

"Okay, the number is correct."

The maid said after taking a few breaths.

Hearing this, Lin Yun immediately got up and left here.

After purchasing the elixir, Lin Yun did not delay, and went out of the city directly, and entered the Great Dao Stone Plate in a hidden place.

"Bai Lao, how is it? Is there any situation in the heart of the earth? ”

As soon as he entered the Great Dao Stone Pan, Lin Yun hurriedly asked.

"No, it's been quiet."

Bai Lao said.

Lin Yun also glanced over there, and the Heavenly Thunder and Earth Heart Fire was still burning quietly in the formation.

"It's strange, aren't the rest of the strange fires extremely violent once they are released? Why is this so quiet? ”

Lin Yun looked at the heavens and thunders in the formation, and said in his heart.

But Lin Yun didn't have the heart to explore, thinking that this day Thunder Earth Heart Fire should have been sealed for too long, and his strength was greatly reduced.

Afterwards, Lin Yun took out the Dan Furnace, opened the Dan Fang obtained in the tomb, and began to look for the ice attribute pill.

"Found it!"

Lin Yun found an eight-pattern pill called Ice Spirit Pill in the pill.

"That's it!"

Lin Yun thought about it, the eight-pattern pill was also possible, so he began to look for the elixir needed to refine the pill.

Soon, more than two hundred elixirs were placed in front of Lin Yun.

With so many ice-attribute elixirs put together, the cold aura emitted made the surrounding grass begin to frost.

Afterwards, Lin Yun began to preheat the Dan furnace and looked at the record on the Dan Fang, how to refine this pill.

And when Lin Yun was preheating the Dan furnace, that day the Thunder Earth Heart Fire seemed to be observing Lin Yun, and the flames were also flashing.