My players are fighting a dragon who naturally has a breath attack, which is a close blast.
The defender in this case is a battlemind, having the dragon marked with his Battlemind's demand.
The marked dragon who is adjacent to the defender uses his close blast 5 attack on the allies of the defender without including the defender in the attack.
Mind Spike At-Will + Force, Psionic, Psychic Immediate Reaction Melee 1 Trigger: An adjacent enemy marked by you deals damage to your ally with an attack that doesn't include you as a target Target: The triggering enemy Effect: The target takes force and psychic damage equal to the damage that its attack dealt to your ally.
Does the defender deal the total damage dealt to all of his combined allies by this attack, or only a single ally? How does he choose? Note: The target is the enemy, not the ally.