Needs review
Source: Homebrew

Description: You become even better at finding moments to attack your foes

Prerequisites: Epic Level, Combat Reflexes, Improved Combat Reflexes, Base Attack Bonus +25, DEX 31

When foes leave themselves open, you may make twice the number of additional attacks of opportunity equal to your Dexterity bonus. For example, a fighter with a Dexterity of 31 can make a total of 32 attacks of opportunity in 1 round--the two attack of opportunity any character is entitled to, plus 30 more because of his +15 Dexterity bonus. If four goblins move out of the character's threatened squares, he can make two attacks of opportunity each against all of the four. You can make two attacks of opportunity per opportunity. With this feat, you may also make attacks of opportunity while flat-footed.