Seven Color Crystal Yuan: Pingcheng

Number: No.1 Walking through the golden afterglow Deep in the earth, a giant tree runs through the entire planet, and this tree is known as the "Crystal Energy Tree." The crystal energy tree grows crazily, constantly emitting colorless crystal elements, and those selected by the colorless crystal elements will become crystal energy users after successfully absorbing them. As the strength of the crystal energy users continues to improve, the colorless crystal energy slowly changes to other colors. Their order is white, green, blue, purple, red, and gold. These seven colors are collectively called "seven-color crystal elements". After Xuanfeng woke up in a strange underground city, he felt that he had been abducted for a moment, but later he discovered that he had already stepped into this supernatural storm. He couldn't imagine a super city attached to a huge tree. This city is an underground city; this tree is a crystal energy tree. And all of this came from an unexpected "death" twenty days ago. He miraculously survived by absorbing colorless crystal elements, and therefore became a crystal energy user and was taken underground. And all the problems he encountered seemed to point to the giant tree in front of him...