Fallen Heaven Domain, Heavenly Fire Plain.

The Heavenly Fire Plain is so large that it has a radius of several million miles, and it is said that this place is transformed by the fire of the earth at the core of the falling stars, so the temperature of the Heavenly Fire Plain is several times higher than that of other places.

There are countless fire-attribute materials here, including spirit plants and spirit fruits, as well as rare fire-attribute demon beasts and insects.

A gray leopard skimmed through the sky at breakneck speed, leaving behind him a long tail flame, which was the fluctuation left by the hot scorching aura.

On the back of the leopard sat a gray-robed young man, who was playing with a rusty piece of iron in his hand.

This person is Gu Changfeng, it has been more than half a month since he left Zeluobo at this time, and along the way, Xiaobai and the Wolf King carried him on his way, allowing him to save time and cultivate Qingyun Duel.

Although the efficiency is only about half of that of a cave retreat, it is much better than wasting all your time on the road.

The iron piece in his hand was obtained from Li Mo, a monk of the Nanning Sect's Fusion Void Realm, and the reason why Gu Changfeng studied it was because this iron piece seemed to be dilapidated, but it could withstand the full force of the starry fall and be unscathed, which showed that its origin was not small.

However, he studied for more than ten days, but found nothing, just when he was about to give up the research and put the iron piece in the storage bag, a material in the pile of materials in the storage bag came out of the slightest abnormality.

Gu Changfeng flipped his hand, and an inch-long black iron rod appeared in his hand, this iron rod was captured when he killed the evil cultivator of the God Refining Realm in the Divine Day Star Fairy Mountain Range, at that time, the old man made this iron rod emit the power of thunder, but after Gu Changfeng studied it a few times during his retreat, the power of the thunder emitted by the iron rod was too weak, or the iron rod emitted only a trace of "current", which was difficult to pose a threat to ordinary cultivators of the God Refining Realm, so it was abandoned by Gu Changfeng in the storage bag so far.

He never expected that the iron rod would be able to react to broken pieces of iron today.

Gu Changfeng tried to bring the iron piece close to the iron rod, and when the two touched, a flash of lightning flashed on the iron rod, and the iron piece was wrapped and absorbed.

There were bursts of thunder from the iron rod, and its surface began to change slowly, and lines like lightning strikes appeared on the surface of the iron rod, flashing with bursts of thunder.

The change of the iron rod aroused Gu Changfeng's interest, he knew that he should have met the baby again, he wrapped the iron rod with spiritual power to hold it in front of him, and released his divine sense to slowly sense the iron rod.

But the moment his divine sense touched the iron rod, the mutation was born, and the iron rod suddenly turned into a black thunderbolt and rushed into his sea of consciousness, Gu Changfeng only felt as if there was a heavenly thunder exploding in his sea of consciousness, he spurted out a mouthful of blood and passed out.

"The hosts! Master, what's wrong with you? Xiaobai noticed Gu Changfeng's change, hurriedly stopped retreating, and shouted anxiously.

"Old wolf, come out!" Seeing that Gu Changfeng didn't answer him, Xiaobai began to call the wolf king again.

Gu Changfeng granted the wolf king the same right as Xiao Bai to enter and exit the spirit beast bag at will, and the wolf king, who heard Xiao Bai's call, turned into a puff of green smoke and came to Xiao Bai's side.

"Master, what's wrong!?" The wolf king was also taken aback when he saw the blood spilling from the corner of his mouth, and Gu Changfeng, who was pale, and hurriedly asked.

"I don't know! When the master was contemplating the broken piece of iron, he suddenly vomited blood and fainted! ”

"What about the pieces of iron?" The Wolf King asked.

"It seems to have rushed into the master's head." The more Xiao Bai spoke, the more anxious he became, he didn't know what to do in place, he hadn't had many years since he followed Gu Changfeng, how could he have seen such a battle, and he panicked for a while.

"Don't panic! Let's go to the ground first, find a hidden place, and we'll figure it out! The wolf king quickly stabilized his mind, he had been cultivating alone for thousands of years, and his mind was much more mature than Xiaobai, and he made a decision in an instant.

Hearing the wolf king's words, Xiaobai hurriedly swept towards the ground with the wolf king, and after reaching the ground, the two of them used their hands and feet together, and soon dug a hole several feet deep in the ground.

"Old wolf, you block the entrance to the cave and arrange the concealment and heat insulation formation, I will protect the master and take him down first, and we will discuss what to do after you arrange it." Xiao Bai saw that Gu Changfeng's body did not fluctuate at all, so he hurriedly used his spiritual power to protect Gu Changfeng's whole body, so as not to burn him by the high temperature.

The wolf king nodded and said, "Don't worry too much, with the strength of the master's physical body, it is impossible to hurt him at this temperature, you take the master down first, I will arrange it here, remember that you can only send spiritual power to the master, and you must not use your divine sense to probe the master's knowledge of the sea." ”

"Okay, just do as you say." Xiao Bai nodded, and hurriedly carried Gu Changfeng to the bottom of the cave.

The wolf king sighed in place, opened his mouth and spewed out several stacks of array flags, arranging the formation.