Luna Mask

The Luna Mask is an artifact used to activate the Alchemy Well in Ayuthay. The mask represents the moon, complementing the Sol Mask representing the sun. It was retrieved by a mysterious adept and used to reactivate the Alchemy Well's full power, resulting in the town of Ayuthay becoming prosperous enough to wait out a siege by Kaocho and later hold out during the Grave Eclipse. It is unknown where the Luna Mask was hidden prior to being found and used, but there are multiple images of it in the Barai Temple which are reminiscent of those of the Sol Mask that appear in the Ouroboros, possibly indicating a connection. This plus the presence of empty treasure chests within the temple could be meant to imply that this is where it hidden.