They All Have Superpowers but I Am Cultivating Immortality

The protagonist comes into contact with a mysterious ball of light at the beginning, but does not awaken any superpowers when awakening. The good-for-nothing protagonist and his sister were ruthlessly abandoned, but in a desperate situation, they discovered that they had a talent that was different from the rest of the world and was bound to the system of cultivating immortals. What changes will he make to the world now that he has power?