Rule Horror: I Survived in the Cultivation World Until I Became Immortal

I transmigrated into a cultivation world filled with strange phenomena, where the forbidden zones are full of rule-based horror stories that eat people! The realms are rigidly suppressive. Challenging those above your level is suicide, and acting rashly means certain death. My aptitude is mediocre. I have no cheat ability and no backing. I rely on only one thing: surviving to the absolute limit. Outwardly low-key and honest, inwardly calculating and devious, never showing off, never taking risks, and never charging in recklessly: those are my first principles.