Immortality Begins with Mortals

This is a story about modern people traveling across the heavens to seek immortality. The protagonist gets a system that can travel through the fantasy world. But the system is a bit useless. Only by becoming the best master in each plane can we make up for the energy that needs to be traversed. There is a proficiency panel. This panel can well reflect the protagonist's training progress. . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.