OTYUGH.ITM

OTYUGH.ITM is an undroppable melee weapon used by various Otyugh creatures. It is placed in one of the creature's "Quick Weapon" slots.
It is considered a magical and +3 enchanted item and deals 1d8 damage (adjusted by Strength modifier), with a range of two feet, and speed factor of 1.
In addition to the crushing damage, each hit inflicts a Disease, that offers no Saving throw nor is it blocked by magic resistance or spell protections. The effect last for 90 seconds (15 rounds).
The disease causes 1 damage every round (this is Poison damage). It also infects the target with a Slow effect. 
Multiple strikes from an otyugh's attack will cumulatively apply the poison damage and refresh the duration of the slow effect.
Removing the disease before it runs its course can be achieved with a Cure Disease spell or item which applies a cure disease effect. 
A target that is successfully struck by this weapon will have two icons assigned to the creature's portrait (No. 7) "Nauseated" and (No. 41) "Slow". If the target is explicitly immune to disease effects then these icons are blocked.
Coding of the weapon also provides immunity to certain creatures that are not affected by disease or poison damage, for better scripting behavior.