Sol Mask, as such it has the same use. The Luna mask is first seen in Ayuthay, in the same location as the Sol Mask is in the Alchemy Forge , except in the Alchemy Well. It is similiar to the Sol Mask in appearence, however, it is a silvery white color, and does not show off spikes, and has a chunk missing on the top left corner, making it resemble the crescent moon. Since it is already afixed to the wall, it is unobtainable as an item. It is theorized that Arcanus wears this missing piece as his mask, creating further speculation that he is Amiti's father, as he was the one who helped retrieve the Luna Mask and start the Well.