C642 Challenge's Rules and Rewards(part I)

"Hehe, this' Myriad Returning Swords' isn't bad. It can actually integrate the formation into it. The founder of Sword Pavilion is a rare genius.

Of course, this isn't easy for you.

However, I will slightly modify it for you to create a 'Hundred Returning Swords'. It's still possible. Of course, the prerequisite is that you need to learn some basic formations first