LogFAQs > #886390828

In Pathfinder, components are pretty simple to deal with.

You just have a spell component pouch that is assumed to have any component or focus without a written value, and you are assumed to stock it back up whenever you're in town.

For components with a cost, you're assumed to have them and just subtract the cost from your gold whenever you cast it. For foci, it's just a one time cost in most cases. (If it asks for a weapon, you're certainly not going to be pulling that out of a small pouch.)

And that's the rules as they are written. If you want to do it a different way, either steal their component pouches while they're far away from civilization or OK it with them first. It would add a lot of extra bookkeeping if you decide not to do it that way.
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Stupid signature!