A seemingly normal blade that when the wielder is below 7 hp covers itself in poo from a secret magical source kept in the darkest corner of the under-dark.
when you hit a creature with this sword while it is covered it will deal an extra [roll]2d6[/roll] poison damage.
Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Sap. If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.
Notes: Damage: Poison, Versatile, Sap