Qingcheng Refining Qi Formula, after reaching the fifteenth layer, derive a spell called Blood Sword Bursting Arrow Technique.
Blood Sword Bursting Arrow Technique, forcibly temper the flying sword with Qingcheng Heart Method, temporarily upgrade the flying sword by one rank, effective on Fifth Grade and below flying swords. After one hour, the flying sword will automatically shatter and cannot be repaired. The daily usage limit is five times.
After using three Soul Attracting Incenses in a row and changing locations multiple times, countless aquatic spirits were killed by Ye Rong. He was a butcher to the Water Tribe. Eventually, his Qingcheng Refining Qi Formula advanced two layers, reaching the fifteenth layer.
"Tempering the flying sword, forcibly upgrading its rank?"
