There's a guy that runs around with 500 alchemical cartridges in are PFS game. The other day he failed a save versus a fire based attack. We were not sure how to handle this. Should we have him roll saves for the cartridges and if so, how many at a time? Also, how much damage should he take if they fail?
If there's a rule in one of the books it would be great to know its location.
Thanks...