Mind Poison

(Spell Compendium, page 141, DnD 3.5)

Necromancy

Level: ; Sorcerer/Wizard 3
Components: V, S, M
Casting Time: 1 standard action
Range: Touch
Target: Living creature touched
Duration: Instantaneous; see text
Saving Throw: Fortitude negates; see text
Spell Resistance: Yes

You spit on your fingers and whip your hand in a snakelike motion, imbuing it with poisoning magic.

You infect the subject with a poison that saps willpower, dealing 1d10 points of Wisdom damage immediately and another 1d10 points of Wisdom damage 1 minute later. Each instance of damage can be negated by a Fortitude save (DC 10 + 1/2 your caster level + your Int or Cha modifier, for wizards or sorcerers, respectively).

Material Component: A piece of a toadstool.