Trash Techniques Are Actually Pretty Efficient

Trash Techniques Are Actually Pretty Efficient,

An old man sold me a suspicious book on the streets... Of course I bought it!

What! It was a fraud?! No matter, I have a system anyways...

[System]: Upgrade Trash level book "How to Cultivate for Dummies" to God level?

[Me]: Yes!

[System]: You have insufficient points.

[Me]: Why'd you ask me then??

[System]: ...