Black Lotus
Level 15 Poison

When prepared as a poison, black lotus is ground into a fine, black powder that causes terrifying hallucinations.

Poison        6250 gp
Attack: +20 vs. Fortitude; while bloodied, the target uses its standard action each round to make a basic attack against the nearest creature, whether enemy or ally (save ends). The effect applies again each time the target is bloodied until it completes an extended rest.
Special: The target takes a -5 penalty to Perception checks until it completes an extended rest. Black lotus can be delivered only by way of food or drink. It makes its first attack 1d6 rounds after its victim consumes it.

Published in Dungeon Master's Guide, page(s) 51.