Caster prestige class with Poison Use (3.5)

[flappeercraft]

Basically what the title says, is there any 3.5 prestige class that has the poison use class feature that progresses spellcasting for a base class or that is specialized in using poison?

[Venger]

unfortunately, no. it's probably easier to either wear gloves, have a dedicated wright poison your weapons for you, become immune to poison, or take master of poisons.

[WhamBamSam]

Psychic Assassin progresses manifesting instead of granting its own, but it's even level progression, so not really any better than dipping Rogue with the ACF from DotU.

Anyway, if I had to guess, I'd say you're probably looking to build around the Poison Spell feat, so it'll have to be actual casting. A Dedicated Wright won't help you there, but Master of Poisons or immunity will work fine.

If you're looking to qualify for a class or something that requires Poison Use specifically, then you might not be able to avoid a Rogue dip or similar.

[WeaselGuy]

There's the Imaskari Vengeance Taker, from Underdark. Requires ranks in Hide, Move Silently, and Survial, Track, 3rd level arcane spells and fluff. 5/10 casting, 3/4 BAB, 4d6 sneak attack, and poison use at level 2. Not really much else to do with poison, but it's there. Black Dog, from Dragonmarked requires ranks in Bluff, Hide, and Sleight of Hand, Least Dragonmark (Mark of Hospitality) and fluff. Doesn't increase spellcasting, 3/4 BAB, but gives some dragonmark stuff and more than a few poison tricks. You might could also check out the Poison Handbook (http://brilliantgameologists.com/boards/index.php?topic=4854.0) for some other options.

[Troacctid]

There's also classes like Green Star Adept and Renegade Mastermaker that just give you actually immunity to poison, which is essentially the same thing except better.

Several races also have it as a racial ability.

[ShurikVch]

Black Flame Zealot (Complete Divine) - Poison Use at 2nd level, 5/10 spell progression