Toxicologist

From publisher blurb: While others dispatch foes with swords or silently stabbing them in the back, a toxicologist bides her time and waits for the opportunity to strike. Using a variety of toxins, she is able to weaken the toughest of creatures, making them easier to be dispatched by her allies. The Toxicologist is a 10 level prestige class that focuses on the use and crafting of poisons to weaken their victim.