The Xacarba from Descent into Midnight has a brutal poison. Im trying to convert it. I have always struggled with changing poisons from 3.5 to Pathfinder
Tri-Venom (Su) A xacarba’s bite can afflict an opponent with one of three separate poisons. Upon damaging a creature, the demon chooses one of the following venoms to inflict upon its foe. The save DCs are Constitution-based.
Abraxas’s Blood: Injury, Fortitude DC 25, initial damage 1d4 Dex and 1d4 Wis, secondary damage causes confusion for 10 minutes and requires a DC 25 Will save to resist. Spells that neutralize poison cure this confusion effect.
Demonic Bile: Injury, Fortitude DC 25, initial and secondary damage 1d8 Str plus 2d8 points of damage to good-aligned beings.
Vile Disjunction: Injury, Fortitude DC 25, the creature is affected by a targeted greater dispel magic effect as if cast by an 18th-level caster. This effect reoccurs as secondary damage 1 minute later. Neturalize poison and similar spells have no effect upon this poison.