I noticed that the "prone" is an effect for brutal barrage power. Does that mean the target is prone after the battlemind hit with brutal barrage (after the standard action)? If so, when should the "headsman's chop" extra damage apply? I assume the BM needs another attack against the prone target in order to get the extra damage because the target is prone only after Brutal Barrage (not during the attack)?
Thank you for contacting us. Brutal Barrage checks after all of the attacks have been resolved to see if they are knocked prone, so you are correct in your thinking. Let us know if you have any further questions!