C506 Accounting for old debts

When Xiao Fan exited the Immortal Forbidden World once again, the change in his entire person was extremely huge, and his strength seemed to have increased by quite a bit.

It had only been more than ten days, but Xiao Fan's improvement was already so obvious. All the Demon Kings were very surprised.

And Xiao Fan had left the Immortal Forbidden World in the short span of over ten days