Epic rarity (Purple) versions of the Fire Oni Mask and the Void Oni Mask can ... She can be found at Demon's Dojo in the map's northeast quadrant. The Mythic Fire Oni Mask is a drop from Shogun ...

If you go this route, you will be able to find the purple ... way to get an Oni Mask is to take out two different NPC bosses. The first is Night Rose, which you can find at Demon’s Dojo.