Cuuko's Magic Emporium

Ring, very rare (requires attunement)

This gold ring is adorned with a black onyx. When worn, the ring allows the wearer to put a creature to sleep, and disguise itself as that creature.

The Infiltrator's Ring has 3 charges, and it regains 1d3 expended charges daily at dawn. As an action, you can spend 1 charge to attempt to dominate a creature that shares a type with you and is no more than one size larger or smaller than you. The target must be within 30 feet of you and in your line of sight. The target must succeed on a Wisdom saving throw, DC 15, or be put into a deep sleep for up to 1 hour. The creature can be awoken as normal.

During the hour, you are magically disguised as the creature, and you gain the ability to mimic the creature's movements and speech, as well as any racial abilities it may possess. However, you cannot access any of the creature's memories, skills, or knowledge. The disguise can be seen uncovered with a successful Perception check, DC 15, made by a creature that interacts with you for an extended period. The Infiltrator's Ring is visible on your finger even when disguised, although it can be hidden with appropriate clothing or accessories.

The disguise is dispelled as soon as the creature wakes.

Creation Notes

Inspiration words: mimicry and dominate. It's rings week!

Lots of ifs and buts. Still I quite like this one.