Sustained Ignite the Sun + Fire Impulse junction keeps d8?

[YuriP]

My doubt is simple.

If a kineticist have Fire Impulse junction and uses it to Ignite the Sun using making 7d8 instead of 7d6. When you sustain it it keeps the 7d8?

This doubt is because the text of Impulse junction says (the highlight is mine):

Quote:

In addition, you gain an impulse junction, a benefit that occurs when you use an impulse of the chosen element that takes 2 actions or more. This happens before the other effects of the impulse, unless noted otherwise. You can gain only one impulse junction per round; they are described in full below.

Quote:

Increase the damage die size of fire damage dealt by the impulse by one step.

So the Fire Impulse Junction will increase the Ignite the Sun before it effects start improving it to 7d8 and Sustain is an action to just extend the duration of an Impulse so in next round the damage keep being 7d8 or reduces to 7d6? If it keep doing 7d8 and another Ignite the Sun is used this another Sun can benefit from damage increase because the Sustain action isn't you "casting" a Impulse or only one is possible?

[breithauptclan]

Sustaining should cause the effects to continue. It shouldn't cause the damage to decrease.

If you do something that causes a different impulse junction effect to happen, I could see ending the Fire Impulse junction because of that and therefore dropping the damage amount of Ignite the Sun (along with all of the other things that the Fire Impulse is increasing the damage of). But that is because of the rule about only having one Impulse junction each round.

[siegfriedliner]

I think once you have used the impulse junction to improve the damage of an impulse it stays improved.

My take on the wording was that if you some how managed to get two two action impulses a turn you couldnt get the impulse junction twice.

[beowulf99]

As Impulse Junctions do not have a standard duration, I assume they are in effect for the entire duration of the Impulse they are modifying, unless otherwise noted.

Earth for example specifies that you only gain the bonus AC until the start of your next turn, even if the triggering impulse would still be in effect.

Since the fire junction does not provide a duration, I think that it is fair to conclude that it's effects last until the end of the impulse, which in the case of Ignite the Sun is when you fail to Sustain it. If that was not meant to be the case, then it would read similarly to Earth and have a duration specified.

[Xenocrat]

I agree that once improved by the junction it keeps the higher die. This would apply to other things, too, like the wall of fire equivalent impulse.