While most psions are content to focus their study on a single discipline and only dabble in the others, some strive to unlock the secrets of multiple disciplines. These secrets come with a price, for the dual disciple is less skilled in the disciplines he has not chosen as his focus.
When the dual disciple chooses his discipline, he also selects his secondary discipline. The dual disciple’s secondary discipline cannot be the Generalist discipline. The dual disciple can select his powers known from this secondary discipline power list as well as from his normal power lists. However, the dual discipline suffers a -1 penalty to his manifester level when manifesting a power of any discipline other than one of those he has chosen. The dual disciple gains his primary discipline abilities at 2nd, 8th, 14th, and 20th levels as normal.
This ability replaces the class skills normally gained when selecting a discipline.
At 10th level, the dual disciple gains the 2nd level discipline ability of his secondary discipline.
This replaces the bonus feat normally gained by a 10th level psion.
At 15th level, the dual disciple gains the 8th level discipline ability of his secondary discipline.
This replaces the bonus feat normally gained by a 15th level psion.
Psionics Expanded: Advanced Psionics Guide. Copyright 2011, Dreamscarred Press; Authors: Jeremy Smith and Andreas Rönnqvist.