Aetherial Crown

 is an item in the The Elder Scrolls V: Dawnguard.

Properties
Lightweight circlet/diadem that allows the player to retain the last Guardian Stone power they selected, and allows them to select another. If the crown is unequipped it will get rid of older of the two stones effects. If the crown is unequipped and re-equiped the crown will remember the other stone you had.

Function
Wearing the crown allows two Standing Stones powers simultaneously. For example, The Warrior and The Mage.

Location
Crafted on the Aetherium Forge during Lost to the Ages.

Trivia

 * With the Crown in your inventory or equipped, the Dragonborn may encounter Taron Dreth where he will ask information about the Crown. He will attack the player with his three mercenaries, no matter which option is chosen in the dialogue.
 * Can be upgraded at a workbench with a Dwarven Ingot, but won't increase it's armor rating.

Bugs

 * There is a bug were the player can obtain more than just two powers after visiting several stones (Tested for The Mage, The Lover and The Steed). (This bug need more information and confirmation)

Appearances
The Elder Scrolls V: Dawnguard