Heir's Protection:

While attuned you gain advantage on saving throws against charm effects.

Royal Favour:

You gain +2 to persuasion while dealing with nobles of scholars in the Othoric Plains

Bloodline's Bond:

If the Heir's name is said aloud the amulet inside glows and points to the nearest noble descendant of Othoria. If presented in front of a true descendant the locket will glow proving their lineage