I am trying to convert a monster from the PAthfinder adventure Souls for Smuggle's Shiv and the creature's poison does 1 dex/rd for 4 rds (save each round). Can I buy venomous 4 times and stack the effects sequencially?
I'd like to note that the four rounds thing is just Pathfinder's way of treating the incubation period. They changed this from the "1 save right now, one after a minute" mechanic of 3E, as people kinda forgot that they were poisoned and didn't ever make the second saving throw. Thus instead of dealing out "lots" of damage once (or twice), you've got a little damage but over several rounds. (In earlier editions, you poison would probably do 1d4/1d4 Con dmg)
FantasyCraft is a bit closer to 3E, so I wouldn't try to emulate the "damage over time" effect of the poison, and simply convert it to a normal venom with a 1 minute incubation time. As this can happen more than just twice, I'd reduce the effect. In your case, I'd just declare it a "fast-acting disorienting poison" and proceed according to the poison table. Still, this would only make it take its first effect after 1 minute, so you might need something faster.
I don't know if the incubation periods in the Poison table are mostly there for flavor or for balance (not enough experience with FC yet), so either disregard the period and make the incubation time 1 round or make it a fast-acting slowing poison.
By the way, now I've got two questions myself:
- Is it possible to double-stack poison modifiers, i.e. have "fast-acting II" to go from 1 hour to one round
- How do poison upgrades modify the XP value of the NPC?