Needs review
Source: Epic Level Handbook

Description: When in combat, your form becomes blurry and indistinct, making it difficult to land a blow against you.

Prerequisites: Epic Level, Hide (30 ranks), Tumble (30 ranks), DEX 30

Attacks against you have a 10% miss chance (the equivalent of one-quarter concealment). You lose this benefit whenever you would lose your Dexterity bonus to AC.