Improved Combat Reflexes

(Epic Level Handbook, page 57, DnD 3.0)

[Epic]

You can respond to any number of opponents who let their defenses down.

Prerequisite

Combat Reflexes, DEX 21

Benefit

There is no limit to the number of attacks of opportunity you can make in one round. (You still can't make more than one attack of opportunity against a single person in a round.)