Each of your opponent's Light Side Characters gets Backfire 2 (If your roll at least one natural 3 for this unit's attack, this unit does 2 dice of damage to itself when the attack ends.)
Keywords
Backfire
Backfire X: A cumulative ability triggered by the initial dice roll that means, "When you roll at least one natural three with this unit's attack dice before re-roll, this unit does X dice of damage to itself when the attack ends." Backfire applies only to dice rolled for an attack, not to dice rolls for abilities like Retaliate.