How do buffs with short durations (let's say guidance, which has a duration of up to 1 minute) work when used to buff rolls for longer-duration actions (such as a heal check to treat disease, which takes 10 minutes)?

Does the buff work at all? Does it have to be cast right at the end before the check?

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    \$\begingroup\$ Is an answer like Nobody knows or The game doesn't say better than no answer at all? \$\endgroup\$ Commented May 21, 2020 at 19:47
  • \$\begingroup\$ I was sure it was already asked on this site. Or was it for another game from this family? Either way it would be great if someone happened to remember it and could link, I can't find it now. \$\endgroup\$
    – Mołot
    Commented May 21, 2020 at 20:28
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    \$\begingroup\$ Related: Can temporary bonuses be used for magic item crafting checks? \$\endgroup\$
    – V2Blast
    Commented May 23, 2020 at 8:23

1 Answer 1


It needs to last for the duration of the action, at least for skills.

If we look at the description for skills, we can see the following line:

Action: The type of action using the skill requires, or the amount of time required for a check.

When you make a skill check, you're making a single roll over that period of time. Not just at the start or the end. Therefore, the buff would need to last for the duration of the action required to make the skill check.

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    \$\begingroup\$ “Therefore, the buff would need to last for the duration of the action required to make the skill check,” [citation needed]. \$\endgroup\$
    – KRyan
    Commented May 22, 2020 at 2:04
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    \$\begingroup\$ I agree that this is a valid interpretation, but needs to be officially supported to be a Stack answer. \$\endgroup\$ Commented May 22, 2020 at 4:16
  • \$\begingroup\$ Crafter's Fortune almost supports this. I'm unsure if there is better evidence. \$\endgroup\$ Commented May 22, 2020 at 4:17
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    \$\begingroup\$ I agree this seems like a valid interpretation, but it is poorly supported. While i don't think it's worthless to point out, I am unsure I can in good faith mark this as accepted. I could easily see someone argue that a majority of the time is spent doing more mundane tasks, (prepping bandages, ensuring things are disinfected, etc.) and that a short 5 minute buff that covers the more crucial moments of the 10 minute check (diagnosing the disease, or determining how to treat it etc) \$\endgroup\$
    – Erudaki
    Commented May 22, 2020 at 14:27
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    \$\begingroup\$ One could, but one could also argue that those mundane tasks are much easier. When talking about big bonuses, disinfecting bandages doesn't get harder and may be a trivial task to do perfectly, but diagnosing the disease does. (DC = Disease DC) I do think that without clarification this does fall into GM discretion, and possibly the best answer may be it depends. I was hoping there was more to it than that RAW. \$\endgroup\$
    – Erudaki
    Commented May 22, 2020 at 14:55

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