Slumbering Scaled Ornament
Wondrous Item, uncommon (requires attunement)
This ornament can be jewelry, a cloak, or another wearable accessory. It appears to be fashioned from a dragon’s scale, tooth, or claw, or it incorporates images in those shapes.
You have advantage on saving throws you make to avoid being charmed or frightened or to end those conditions on you.
Source: Fizban’s Treasury of Dragons p. 27