( * BREATHES IN* A looooong time ago, in reaaly old Dreamtale, (dreamtale is the au that Nightmare is in.) there was a guardian named Nim. Some evil human decided to try to unalive Nim. Well they did succeed to dust them, they also died, and went into one of the dark apples on the Tree of feelings.( the tree of feelings has two sides, the Positivity side, filled with Gold apples, and the Negativity side, filled with Black Apples.) Nim created two children named Dream, New Guardian of the Positivity and Nightmare, New Guardian of the Negativity. Time skip, Nightmare gets bullied and Dream is now Famous. Another time skip, Nightmare eats all of the black apples, including the possessed one, and it turned him into an octopus. A loooong time skip and Dream is tired of this and eats a black apple, and The True Nightmare comes back, the goop melting into the Amulet.