Practitioner of All Realms

The protagonist obtains the system and begins the journey of cultivating immortality. I discovered that immortal cultivators are not that powerful and omnipotent. We still have to maintain peace in the darkness of the world. Maybe a person who is inconspicuous in ordinary times is a great hero who has saved the world. There are all kinds of bizarre realms and races. Due to the isolation of each realm, various civilizations have developed. The greater the ability, the more they like to take responsibility on themselves. In the face of a common enemy, human beings are unprecedentedly united. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.