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I was hoping someone could help me figure out what to do for poisons on say a spider or scorpion as it increases its size category? I know the save DC goes up just from HD, but it seems the poisons potency should also increase and the Beastiary does not seem to show that at all. When looking in Beastiary 2, it shows larger spiders and a super large scorpion with higher ability damage/missed save so I was wondering where I could look to find what it should be? I can always house rule it, but I was hoping for something a bit more official. Thanks.
I was hoping someone could help me figure out what to do for poisons on say a spider or scorpion as it increases its size category? I know the save DC goes up just from HD, but it seems the poisons potency should also increase and the Beastiary does not seem to show that at all. When looking in Beastiary 2, it shows larger spiders and a super large scorpion with higher ability damage/missed save so I was wondering where I could look to find what it should be? I can always house rule it, but I was hoping for something a bit more official. Thanks.
Hmm. Don't think there's an official answer.
As far as (real life) toxicology goes, the size of the creature has nothing to do with the potency of venom. Adolescents can be more potent than full sized adults...
But this is pathfinder... plus it does seem that a scorpion that injects half a gallon worth of venom would do something more.
Venom's saves are constitution based, so bigger creature more con. If you wanted to house rule it, increase the save based off the con, increase the attribute damage based off the weapon size chart (d2 to d3, to d4 to d6 to d8).
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Thanks. That is actually how I was going to do it I was just hoping to find something more official. And yes, I actually know in real life it would not be a worse poison but just harder to resist based on the amount but I was thinking in terms of game mechanics, challenge rating, using restorations, etc... Not a huge deal but thanks for your thoughts on it.
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From universal monster rules on poison: " The saving throw to resist a poison is usually a Fort save (DC 10 + 1/2 poisoning creature's racial HD + creature's Con modifier; the exact DC is given in the creature's descriptive text). Poisons can be removed through neutralize poison and similar effects."
I would suggest you increase the ability damage similar to how you increase their natural weapons damage:
1d2 -> 1d3 -> 1d4 -> 1d6 -> 1d8
I wouldn't go past 1d8 regardless.
Another thing you could do, rather than making then extremely hard to resist or deal more ability damage, would be to require 2 consecutive saves on the poison.