Give this character a power action. This character makes 2 combat attacks (close and/or ranged) as free actions and possesses  during the action.

2013 Wording: Give this character a power action to make a duo attack. This character possesses  for this action. It makes a close or ranged combat attack as a free action. After the attack resolves, it may make an additional close or ranged combat attack as a free action with its damage value modified by -1 to a minimum of 1.

2012 Wording: Give this character a power action to make a duo attack. This character possesses for this action. It makes a close or ranged combat attack as a free action. After the attack resolves, it may make an additional close or ranged combat attack as a free action with its damage value modified by -1 to a minimum of 1. If this character is defeated or loses Duo Attack as a result of the first attack, the second attack is not made.

•This ability gives you free combat attacks, not actions. Most powers cannot be used in conjunction with Duo Attacks (i.e. Exploit Weakness, Energy Explosion, etc) because those other powers require special actions