C427 Four Symbols Nirvana Sword Formation

After discovering this flaw, Sun Bing's heart was filled with a trace of excitement, because this could be said to be the main flaw of his opponent. As long as he could continue to persist, there was a possibility that he would turn the tables on his opponent.

He couldn't help but swing his sword and attack Wei Changdong.

However, Sun Bing didn't consider perfecting his attack