The special abilities that natural and artificial wonders grant their users are something the organ-type foundation lacks. So not only are artificial wonders as good as natural wonders, but they can also be created artificially, which ensures supply.
These two reasons are why ever since the artificial natural wonder foundation was discovered, there hasn't been a need to discover a new type of foundation. But that did stop people from discovering one.
Besides, there was a want for a foundation that didn't try to kill the cultivators that used them. This want led to the discovery of the energy-type foundation.
The energy-type foundation is established by creating more and more life seeds in the body by breaking through to the second mortal coil over and over again using the blood essence of powerful creatures. It is a process of establishing a foundation by shoring up life seeds one at a time.
