Added tidbits of mask history to my CS. 

Also, since you asked Gisk wether you could use their mask, I'm assuming a possible consideration of masked NPCs within this story. In that case, I could PM you the mask concept I had for Majora's Mask in case you want to draw inspiration from it. The Mask concept itself is quite alright I think, it just doesn't live up to the name - that, and I started hating the character tied to it.