Imbue arrow and riving strike

[Kello]

I am currently working a build for an arcane archer for PFS. If he has riving strike and uses imbue arrow with a slow spell cast on it would the -2 penalty to saves from riving strike take affect before the save for the slow spell?

[MrAmiSuzuki]

Kello wrote:

I am currently working a build for an arcane archer for PFS. If he has riving strike and uses imbue arrow with a slow spell cast on it would the -2 penalty to saves from riving strike take affect before the save for the slow spell?

Necro. Sorry

I would say after since the arrow still has to hit. Hitting the target is the condition for spell completion.