A moonsteel armlet set with diamonds
Some sovereigns prefer a different sort of tax from their subjects - whether freely given, or taken by force.
30 Rings to rule them all…
A set of stones which bring trouble wherever they go.
A Magic ring, made from the storm shards. It can transform the morality of a person and contain them until the world has forgotten them. In effect it renews a person after their own personal storm.
It is only the size of a thumb, but when this spakling stone burns with an inner fire, the destiny of holder changes.
The Seven Lords of the Peninsulari each wore a magical signet ring identifying them as a sovereign lord.
If you want to add a "supernatural" touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.