Grimeblade
Weapon (shortsword), very rare (requires attunement)
The surface of this shortsword is coated in a disgusting layer of unidentified scum that jiggles, bubbles and oozes. When you hit with an attack using this magic sword, the target takes an extra 1d8 poison damage. In addition, while the sword is on your person, you are immune to disease.
The sword has 6 charges, and it regains 1d4 + 2 expended charges daily at dawn. As an action while wielding the sword, you can expend 1 charge to cast the stinking cloud spell (DC 16) from it. When you hit a creature with this weapon, you can expend 2 charges to infect it with a disease. The creature must succeed on a DC 16 Constitution saving throw or suffer the effects of the contagion spell (DC 16) as if it was hit by the spell attack. A creature that succeeds on the initial saving throw is immune to this effect for 24 hours.
The stench wafting off of this foul weapon is enough to raise the dead. Luckily you’ve gotten used to it, but your companions keep a distance.