Pack Feint( Dragon Compendium)
[Fighter Bonus Feat, General]
You know how to confuse an opponent with the aid of your comrades.
Whenever you successfully use Bluff to feint in combat, the target loses his Dexterity bonus to Armor Class for your next attack and the next attack of any allies adjacent to the foe when you made your Bluff check. To benefit from this feat, each ally's next attack and your next attack must be made on or before your next turn.
A fighter may select Pack Feint as one of his fighter bonus feats.
After a successful feint in combat, your victim loses his Dexterity bonus to AC for your next attack, so long as you make your attack on or before your next turn.