Ye Xiong reluctantly gave Shi Yan an Ethereal Crystal under the urging of Zhu Yi, Yue Ying, and Yun Xiu.
A small pile of silver Ethereal Crystal was shining, with many cracks on the crystal surface. Space power vaguely moved there. These fist-sized crystals had conical and diamond shapes. They were heavier than they looked.
"Ethereal Crystal’s the fundamental element of Teleportation Formations. When one pours energy into the Ethereal Crystal, it can urge space power," Ye Xiong’s face was bitter. "I had ruined an old, shabby Teleportation Formation in an old place to take these crystals. If you don’t know how to use it, you should choose another thing to exchange."
Shi Yan chuckled and then stashed away the Ethereal Crystals. He glared at Ye Xiong, "You don’t need to mind me."
