I! Practice Qi for a Hundred Years!

Misora ​​traveled to a world of cultivating immortals. Although his qualifications are mediocre, he has received the standard equipment for time travellers——the system. I wanted to make great progress all the way with the support of the system. However, In this cheating system, the only locking skill is-upgrade slowdown. While others can practice in a few years, it took Misora ​​a hundred years to succeed. The system is euphemistically called ----- Slow work produces careful work and lays a solid foundation. Misora: "Fuck you! I'll lay the foundation for your a**!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.