Crown of Obadai

Wonderous Item, artifact (requires attunement by a spellcaster)*
While wearing this crown you have advantage on saving throws against spells and magical effects, you are immune to magic that allows other creatures to read your thoughts, determine whether you are lying, or know your alignment.
Obedience. As an action you can command obedience from each creature of your choice that you can see within 120 feet of you. Each target must succeed on a DC 15 Wisdom saving throw or be Charmed by you for 8 hours. Stone giants have disadvantage on their saving throws.
While charmed in this way, the creature regards you as its trusted leader. If harmed by you or your companions, or commanded to do something contrary to its nature, a target ceases to be charmed in this way. The crown can’t be used again in this manner until 8 hours have passed.

*Stone Giants have access to the crown’s full power:

The crown has 30 charges for the following properties. The crown regains 2d10 + 10 expended charges daily at dawn:
Dominate. You can use an action to take control of one creature Charmed by the crown’s power. The creature must make a DC 20 Wisdom saving throw or be dominated as in the spell Dominate Monster.
King’s Lineage. While wearing this crown, you can use a bonus action to cast magic stone or mold earth. Alternatively, you can use an action to spend a charge or charges to cast one of the following spells:

• Charge (1): Earth Tremor
• Charge (2): Earthbind, Maximilian’s Earthen Grasp,
• Charge (3): Erupting Earth
• Charge (4): Charm Monster, Dominate Beast, Stoneskin, Stone Shape
• Charge (5): Conjur Elemental, Transmute Rock, Wall of Stone
• Charge (6): Bones of Earth, Flesh to Stone, Investiture of Stone
• Charge (7): Move Earth Tremor
• Charge (8): Dominate Monster Earthquake