C90 mutation

"This piece of metal should only be a fragment. Put it away first, we'll study it when we have the chance in the future." Elder Ling passed the iron piece to Ye Xuan.

"Holy shit, 50 gold coins for a piece of scrap metal. This time, I'm really going to lose big time." Ye Xuan muttered as he took the iron piece from Elder Ling's hand.

Just as Ye Xuan was about to touch the metal