Cloak of the Rat

Wondrous item, rare (requires attunement)

While wearing this gray garment, your passive Wisdom (Perception) score improves by 5. Additionally, once per day as a bonus action, you can shrink to one size category smaller for 1 round. This contortion allows you to fit through spaces normally too small for you, to escape bonds, or any other too-tight situation.

Finally, once per day as a bonus action, you can transform into a rat for up to 1 hour. You can revert to humanoid form as a bonus action. This effect is otherwise identical to a druid’s Wild Shape feature.