Blackrot(Complete Mage, p. 96)
Level: Druid 2, Wu Jen 2 (wood),
Components: V, S,
Casting Time: 1 standard action
Target: One plant creature or one wooden weapon touched
Duration: 1 round/level
Saving Throw: Fortitude partial or Fortitude negates
Spell Resistance: Yes
The plant-matter creaks and writhes beneath your hand as you generate a malignant rot at its center.
This spell allows you to deliver a single touch that either damages a plant creature over a number of rounds or renders a wooden weapon poisonous.
When used as a touch attack against a plant creature, the spell deals 1d8 points of damage per round. A successful Fortitude save reduces the duration to 1 round.
Alternatively, you can touch a weapon with a wooden striking surface (such as a club or quarterstaff). Any creature damaged by the weapon is sickened for 1 round unless it succeeds on a Fortitude save. Treat this as a poison effect for creatures immune or resistant to such effects.