Ring of Invisibility

A ring of invisibility is a legendary item that permits the wearer to become invisible.

Appearance
The ring Vox Machina found had interwoven gold and platinum bands.

Properties
The ring requires attunement. An attuned wearer can use the ring to turn invisible as an action. They become visible again when they attack, cast a spell, or use a bonus action to become visible, but there are no limitations on the uses per day.

History
Vox Machina found the ring in Vorugal's horde after defeating him. Vax'ildan ultimately took the ring and first attuned to it when the party was in the City of Brass.

Vax lent the ring to Kerrek when Kerrek joined the party to help fight Raishan. He later gave it to Tova after she had helped them in the Nine Hells to make it easier for her to escape.

Trivia
The ring of invisibility in D&D is likely based off the rings of power from Lord of the Rings.