Verminshroud (Dormant)

Wondrous Item

Legendary Requires Attunement

This patchy cloak was pieced together from the pelts of rats found feasting on the dead and is dotted with the bloated corpses of magically preserved insects along its seams. Dormant. While wearing the Verminshroud in its dormant state, you gain the following benefits:

You have advantage on Wisdom (Perception) checks that rely on smell, you are immune to disease, and you have darkvision out to a range of 60 feet. If you already have darkvision, wearing the cloak increases the range of your darkvision by 60 feet.
As an action, you can use the Verminshroud to cast polymorph on yourself, transforming into a giant rat or rat while retaining your Intelligence, Wisdom, and Charisma scores, as well as the properties of the cloak. This property can't be used again until the next dawn.