C600 Second Sky of the Rebirth Realm!

Devil's Heart, Devil's Flames Soul.

Inner demons only appeared after the Eternal Realm, which allowed one to cross realms over and over again.

For example, one could step into the Imperishable Realm while the other could step into the Nirvana Realm.

To a practitioner, the growth of any inner demon was a great opportunity that they could only seek by chance.

But at the same time