Although Xin Yun currently has many magical artifacts, at the core, the one he values the most is the Thunderbolt Mace. In terms of level, the Xuan Yuan Water Control Flag is still one or two levels lower than the Thunderbolt Mace!
In fact, if all five flags of the Five Directions Banner could be gathered, their power would definitely be comparable to the Immortal Slaying Sword Formation. However... the other four flags are all in Hong Jun's possession, so obtaining them is impossible.
Speaking of defense, the Xuan Yuan Water Control Flag is indeed invincible below the saint-tier level. However, the current issue is that with the Thunderbolt Mace, Xin Yun is already invincible below the saint-tier level and can even inflict harm on saints!
