Genshin Impact.

Lin Feng and Li'er followed the mysterious old man and traveled along the immortal path. After all the previous experiences, their use of their own immortal power and understanding of the immortal path have been greatly improved.

At this time, they were in a foggy forest. The fog was so thick that people couldn't see the road ahead. Lin Feng looked around vigilantly, and the fairy sword in his hand flashed a faint light. Li'er followed closely beside him, and there was a hint of uneasiness in her eyes.

"Master, this fog is so strange, how should we move forward?" Lin Feng asked.

The old man stroked his beard and said after thinking for a moment: "This fog is an obstacle on the way to immortality. It tests our character and wisdom. If we want to break this situation, we need to calm down and feel the flow of the air around us."

Hearing this, Lin Feng closed his eyes and slowly released his immortal power, trying to sense the surrounding environment. However, the mist seemed to have the ability to devour immortal power, and his immortal power quickly dissipated as soon as it came into contact with the mist.

Seeing this, Li'er also tried to use her own magic to disperse the fog, but the result was also in vain.

"Don't waste your energy. This maze cannot be solved by relying on immortal power." The old man said, "We need to find the center of the maze."

The three began to explore the forest carefully, taking every step with extreme caution. Suddenly, Lin Feng felt the ground beneath his feet tremble slightly, and then, huge spiders hung down from the trees, pouncing towards them with their fangs and claws bared.

These spiders were flashing with strange lights, obviously being controlled by magic. Lin Feng raised his sword to meet the enemy, and with the flickering sword shadow, he cut down the spiders one by one. Li Er also used her own magic to provide support for Lin Feng.

The old man was observing the surrounding movements, looking for clues to the center of the formation. With the cooperation of the three people, the spider's attack was gradually resolved.

But as they went deeper, the fog became thicker and the surrounding scene became more bizarre. The trees that were once full of vitality now seemed to have turned into monsters with bared fangs and claws, stretching out their branches towards them.

Lin Feng struggled to cut off the branches, his forehead covered with sweat. Li'er's immortal power was also constantly consumed, and her face gradually turned pale.

"Everyone be careful, the maze is getting stronger and stronger, we must find the center of the formation as soon as possible." The old man said loudly.

At this moment, Lin Feng found a flash of light in front of him. He was moved. Could it be the center of the formation? He quickened his pace and walked towards the light. Li'er and the old man followed closely behind him.

When they came to the light, they saw a huge crystal stone embedded in the ground, surrounded by complex runes.

"This should be the center of the formation." said the old man.

Lin Feng raised his sword, ready to destroy the crystal stone. However, just as he was about to do so, a powerful barrier of immortal power suddenly rose up, blocking them out.

"It seems not that simple." Lier frowned.

The old man carefully observed the runes, thought for a moment and said: "This rune is an ancient immortal restriction. We need to find a way to break it."

The three began to study the runes and tried to crack them with various magic methods. After some effort, they finally found the pattern of the runes and successfully cracked the restriction.

Lin Feng raised the sword again and swung it vigorously. The crystal stone instantly shattered into countless fragments. As the crystal stone shattered, the surrounding fog began to dissipate rapidly, and the forest returned to its original appearance.

"Finally, I have solved this puzzle." Lin Feng breathed a sigh of relief.

The old man smiled and nodded: "This is just a small level on the way to immortality. There are more challenges waiting for us later."

The three of them continued to move forward, heading towards the unknown immortal path...