However, you or your opponent may use an effect to re-roll dice to affect the number of natural sixes. Accuracy can't increase the die roll to a natural '6'. If a unit gets the Critical Hit ability after you roll attack dice, it's too late to affect the damage.
Keywords Critical Hit Critical Hit X: A cumulative ability triggered during the pending damage POP that means, 'If you rolled at least one natural six with this unit's attack dice, this unit does X more damage for this attack.' Only one natural '6' counts in the attack roll after re-rolls.
