Psionic bonus

Psionic bonus represents the power of mind over matter. In a character's mind, anything can happen. By harnessing the energy of the mind one can accomplish things beyond what is thought possible.

In DDO, psionic bonuses are only on a handful of rare items, e.g. the.

The Kensai core enhancement, Power Surge also provides a +8 Psionic Bonus to all ability scores.