Moved nightmare into nightmaremoon
Look next lines for a short explication about why

added nightmarerarity from the commic... yes nightmarerarity... yes is rarity
In the comic was explicated that nighmare is another enity (in seasson 2 'domated' by Luna throw they will force)
this is what give to Luna they new look and the abilityy to trave across dreams
but they fedd from despair, anger, sad, and other bad fellings, this 'thing' excape and try to manipulate the mane6
throw they real nightmares in they dreams...only rarity fall in they nightmare...the loneliness...
anyway this at same time indicate that the other mane6 can have nightmnare-d forms

Signed-off-by: Pablo Roberto Francisco Lezaeta Reyes [pˈaβ̞lo roβ̞ˈe̞ɾto fɾaɳθˈiʰko lˌe̞θaˈeta rˈejɛ] <prflr88gmail.com>