Vesper Primer+Standard Actions+Song of Sakorsis

You recite inspirational lines from this epic poem commemorating the final stand at Storasta, keeping defiance alive even in the face of certain death.

Bardic Performance: Standard action to begin, free action to maintain

Prerequisite: Perform (oratory) or Perform (sing) 10 ranks.
Cost: Feat or 4th-level bard spell known.

Effect: When you complete the performance, all allies within 30 feet gain an attack of opportunity when reduced to negative hit points, or whenever a foe deals hit point damage equal to or greater than its Hit Dice, for the duration of the performance. The attack of opportunity can be made against any enemy within reach; it does not have to be against the source of the damage, and does not count toward your allies' maximum attacks of opportunity per round. This attack of opportunity is resolved prior to the enemy's attack, but the triggering attack is still resolved even if the enemy is killed or incapacitated.