Combat Reflexes (Feat)
You can make additional attacks of opportunity.
Prerequisites: —
Benefit: You may make a number of additional attacks of opportunity per round equal to ½ your Dexterity modifier (dropping fractions, minimum +1), to a maximum of +4 bonus attacks of opportunity per round (at Dexterity 26, modifier +8). Note that these bonus attacks of opportunity are in addition to the 1 attack of opportunity everyone gets each round. Thus, a character with a Dexterity score of at least 26 (modifier of +8) would get a total of 5 attacks of opportunity each round (4 from this feat, plus the 1 that all creatures get).
The Combat Reflexes feat does not allow a rogue to use her Opportunist ability more than once per round.
Special: With this feat, you may also make attacks of opportunity while Flat-Footed.
Normal: A character without this feat can make only one attack of opportunity per round and can't make attacks of opportunity while flat-footed.