karmic strike

[TheOOB]

12 or more dex; it allows a number of additional AoOs, not AoOs, equal to dexterity bonus.

Note that according to a completely useless, literalist, neither RAU nor RAI reading, once you use up the extra AoOs from Combat Reflexes, they're gone; you may make a number of additional AoOs, not additional AoOs per anything. You get one AoO per round, plus a number of AoOs equal to your dexterity bonus, but no more than one per opportunity. The intent is clear, and the FAQ probably clears this up, but the feat doesn't say that you get them back every round.

Acually take a look at the Attacks of Opportunity section of the SRD.

Combat Reflexes and Additional Attacks of Opportunity

If you have the Combat Reflexes feat you can add your Dexterity modifier to the number of attacks of opportunity you can make in a round. This feat does not let you make more than one attack for a given opportunity, but if the same opponent provokes two attacks of opportunity from you, you could make two separate attacks of opportunity (since each one represents a different opportunity). Moving out of more than one square threatened by the same opponent in the same round doesn’t count as more than one opportunity for that opponent. All these attacks are at your full normal attack bonus.