Status effect
Status effects are negative debuffs that usually have fixed duration. Some status effects work differently when applied to players or mobs.
Blind
Characters affected by blindness are unable to use the look command in any way, and are unable to manipulate items, save to drink glowing potions, eat food, or drink water if these items are openly in his inventory. Characters affected by blindness attack and defend more poorly unless they are proficient in blindfighting.
See Also: Blindness, Gouge, Blinding dust, Dirt kicking
Poison
Most poisons will penalize the target's strength slightly and cause them to take damage every half-hour. Some poisons may also be applied through food or drink. Certain poisons, such as those of venomous desert adders, are much stronger than others. Some weapons may be poisoned as well, to afflict those struck with the same poison. Hiding and using camouflage is more difficult while poisoned due to the regular damage. Getting restful sleep is nearly impossible.
Assassins have access to specialized poisons with additional effects. See the prepare skill for details.