Ring

Uncommon Requires Attunement

Description.

This simple silver band is engraved with tiny cheese wedges on the inner side.

Mouse Companion.

When you attune to the ring, a friendly mouse appears within 10 feet of you. This mouse is magically bonded to you.

The mouse is Tiny, has 4 hit point, AC 12, a speed of 20 ft., and understands any verbal commands you give it, though it cannot speak.
He has darkvision in 30 Ft. and a passive Perception 10.
The mouse has advantage on Wisdom (Perception) checks that rely on smell.

In dangerous situations it takes the Dodge action unless commanded otherwise.
It can perform simple tasks like fetching small objects, delivering notes, or scouting within a 30 ft. radius.

Loyal Friend. If the mouse is killed or moves more than 1 mile away from you, it disappears in a puff of sparkles. He appears beside you at the next dawn as the magic of the ring reconstructs his soul and body.

While wearing the ring, you both can communicate simple ideas and emotions to each other telepathically within 30 feet.

“He’s been in your pocket for months now. Pretty sure he knows more about your secrets than your party does.”