In Chaos, there are countless types of Secret Techniques. Not to mention those at the Controller Level, even beings at the Taoist Realm or Earth Realm, if they so wish, can slowly create secret techniques, though the power is uncertain.
Typically, the greater the power of a secret technique, the more complex it is. For example, top-notch secret techniques like the Hongmeng Dao Pattern are extremely complex and require a staggering amount of materials and resources for cultivation.
