You are able to resist compelling effects with exceptional agility.
Prerequisites: Dex 25, slippery mind class feature.
Benefit: Once per round, when targeted by an effect that requires a Will saving throw, the character may make a Reflex save instead to avoid the effect (evasion is not applicable).
Source: Standard Reference Document under Open Game License v1.0a, which updated this feat originally published in the Epic Level Handbook, page 53.