Sometimes extreme situations call for extreme measures. By any standard, detonating your own psicrystal in a cataclysmic spray of crystal shrapnel is an extreme measure.
You can manifest this power only by channeling it through your psicrystal (which means you can't use this power if your psicrystal is more than one mile from you, or if you do not possess a psicrystal). Once manifest, your psicrystal overloads, magnifying the power with the sum of its own essence and blossoming into a burst of psiactive shrapnel that deals 30d6 points of damage to all creatures within the area. Unattended objects also take this damage. Detonating a hero psicrystal deals an additional 2d6 points of damage, while detonating a coward psicrystal deals 2d6 fewer points of damage.
The purposeful detonation of your psicrystal entails a sacrifice on your part (and your psicrystal's!). You must attempt a Fortitude save (DC 15). If the saving throw fails, you lose 200 experience points per class level. A successful saving throw reduces the loss by half. You also lose the abilities granted by the psicrystal and a piece of your mind as originally imbedded in the psicrystal (which drains your Intelligence by 2 points). A destroyed psicrystal cannot be replaced for six months. The drain to your Intelligence cannot be recovered until you gain a new psicrystal.
As noted above.