nightmare rarity are non canon character but for non canon she very nice! in the show or movie none of them tell info of thos comic and is prove are canon but the comic show some info can be usefull like celestia force vs big mac force! she show alicorn of her age are not easy to make them losse on iron houve! if thos comic are canon the show and movie will give prove thos are canon! but none of them be prove are canon! but mose fan think this*oh made by hasbro so is canon!* no is not ! the only thing thos comic are good for! is story! thos comic are nothing of fan made cash version! got it! if you want think is canon well is your problem! if nightmare rarity are canon some character will say some thing like twilight,luna,celestia,cadence,discord,rarity! one character say some thing is prove nightmare rarity is real? none! sure i look them but only for fun! but i take thos very seriously! all episode i see never say a thing of all thos! like reform sombra! if he be canon sombra will show up! but none of thos are true! so all this say on the crystal empire are not true or all equestria! only the show and the movie are canon!