Nvvyn said:
How on earth do you come up with 4 months to craft one dose of the poison. one dose cost 1500 gold.
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Please post some proof to this 4 month for one dose method.
Standard Craft rules... The amount of progress per week is equal to your Craft check times the DC in silver pieces.
DC to craft Dragon Bile is 30. I assumed you have a Craft

oison (or Alchemy) skill of 20. Taking 10, that's a check result of 30. 30 x 30 = 900 sp or 90 gp/week. 1500/90 = 16.7 weeks, or 3.8 months.
Yes, this is ridiculously slow (my DM lets me get away with silverpieces
per day), but that's the standard rules. Regardless of what house rules you use for this, I think allowing you to craft something like Dragon Bile poison in less than a day (even less than a week) would be highly unbalancing!
Also keep in mind that you have a 5% chance of poisoning yourself when you apply the poison to a weapon, and when you fumble on an attack roll you must make a Reflex roll to avoid poisoning yourself as well.
BTW, Dragon Bile isn't *that* great against a dragon. It does 3d6 Str, but a dragon has Strength to spare. And one dose is only good for one attack. Even if you get several doses, manage to coat the weapons and attack the dragon without poisoning yourself, and do enough Str damage to reduce the dragon to zero, it'll still blast you to bits magically.
PS: just to top it off... have you had a look at the saves an Ancient Red gets? Fort +28! It'll
laugh at dragon bile poison!