Intense spells question

[MyTThor]

PRD wrote:

Intense Spells (Su)

Whenever you cast an evocation spell that deals hit point damage, add 1/2 your wizard level to the damage (minimum +1). This bonus only applies once to a spell, not once per missile or ray, and cannot be split between multiple missiles or rays.

Would this apply as well to a spell with ongoing damage, like Flaming Sphere? The rules say once per spell, but then specifically call out rays/missiles. But the sphere is just one sphere, so on subsequent rounds would the intense spells damage apply?

Thanks for opinions

[Adamantine Dragon]

I'd probably rule that it applied on the first round of damage the sphere does, but not later rounds.

[wraithstrike]

I agree with Adamantine Dragon. The RAW does say "only applies once to a spell..".

[MyTThor]

bump for more opinions?

[Stockvillain]

I'd also be inclined to have the increased damage apply to the initial instance of spells with ongoing damage; I sorta see it as that initial flood of power that the caster is able to infuse, and after that it's all run as normal.

[cwslyclgh]

yep, once per spell is once per spell.