I once played a chemist/herbalist who was a refluffed wizard. He didn't know magic spells, but what he had were various compounds and chemicals that he would throw at the enemies. I went onto various websites to look up poisonous herbs to use in the refluffing. Winged horde, a psychic illusion at will attack, became Jimsonweed extract. (Jimsonweed, FYI, is a hallucinogenic plant.) Illusory Obstacles became Hemlock powder. Sleep became Mandrake extract.

A fun character to play, though I hit a fluff snag when the party came up against skeletal undead.