Defenseless foes and burst weapons

[JungleChicken]

So a coup de gras is an instant crit, at least damage wise, so if one were to have a burst weapon would you include that damage or should that be up to a natural crit kind of like the magical align and boom you crit every now and then because of it.

[Popertop]

Any bonuses you get on a critical, such as extra dice from a burst weapon, will also apply on a coup de grace, since it is an automatic crit.

So yes, you will get those extra dice on a coup de grace from something such as a +1 Flaming Burst Greatsword.