Poisonous Admixture (3.5e Feat)
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Poisonous Admixture [Monstrous]
Your poison gains an additional damage type.
Prerequisite: Poison attack with ability damage, Con 15, Ability Focus(Poison)
Benefit: Choose one poison attack. The initial and secondary damage now deal an additional ability damage (Str, Dex, Int, Wis, Cha) equal to half the original ability damage.
Special: This feat may be taken multiple times, each time applying it to a different attack.