Self Concealment

 
Prerequisite(s): Character Level 21+, Dex 30+, Hide 30+ ranks, Tumble 30+ ranks, Improved Evasion
 
Benefit: Attacks against the character have a 10% miss chance, similar to the effect of concealment. The character loses this benefit whenever he or she would lose his or her Dexterity bonus to AC.
 
Special: This feat may be taken multiple times. Each time it is taken, the miss chance increases by 10% to a maximum of 50% after it has been taken five times.
 
Source: Epic Level Handbook