| Tajic |
In Occult realms under the psi-tech abilities we have the "capstone" of them all Artificial Ascension. As written it says that a character must be 20th level to take this Discovery. That's all well and dandy and for the potential power of the ability that's a good point to be able to get it.
The issue I find is in the ability to actually get it. In order to take a Psi-tech Discovery you either sacrifice a feat or a phrenic amplification. The last Phrenic amplification a psychic receives is at 19th level and that's the last point you can get a feat as well.
Pathfinder assumes that Epic levels aren't a thing so there is no level 21 feat to replace for this and the only other way I can think of to get the ability is dip a level of fighter to get a bonus feat and swap out that feat. But that seems sub-optimal to me.