One With the Stone [feat, 3.5, scaling]
The depth of your bonds to and the expanse of your knowledge concerning the nature of your psionically active crystal lead you to vastly improve it over time.
Requirements: have a psicrystal, crystal psi weapon or psignet.
Benefits: This is an ability that scales with the highest level power you can manifest, as follows:
0) Improved Psicrystal (available even if no class-based manifestation can be done)
1) Psicrystal Containment
3) Power Psicrystal
6) Enhance Psicrystal or Improved Crystal Psi-Weapon
9) Construct Core: Any construct you build can bond with your psionically active crystal, using the more beneficial of the combined stats for as long as they are bonded.
Special: All abilities of this feat apply to all of your psionically active crystal items simultaneously, applied by description.