The Casted Shade of Past Mistakes

Nightmare. You should know my story well. Heh. I mean the other me's story well. If you don't then where the f*@# are living? Anyways, the story of the two Guardians of Positivity and Negativity. Two beings were created to be guardians of positivity, dreams, the golden positivity apples, and negativity, nightmares, and the dark negativity apples of the tree of feelings.
Dream and Nightmare, brothers.
Dream was treated with kindness, given many gifts, and so on, having many "friends". Though let's be honest: He was treated with kindness so the villagers would be on his good side, and his friends just use the gullible idiot to get the golden apples.
Nightmare, unlike Dream, was treated like shit. He was bullied daily, usually ending up with major injuries, caused by Dream's little "friends". Dream never notices and never figured it out.
Until it was too late.
One day, after so many years of bullying, Nightmare took a golden apple.
Mine are just as good as his, right?
The tree's apples quickly all turned "dark". The surrounding monsters of humans started yelling and approaching him. In a panic, he took a bite of the apple. He started throwing up black goop and 4 sharp tendrils burst out of his back. He was starting to be covered in black goop. His eyes turned cyan as one of his eye sockets got covered in the black goop.
He killed everyone. He became the "monster" everyone said he is. He attacked his brother. Both left hurt, but not dead.
He's also known as the King of Negativity and Nightmares or the Boss of the Bad Guys/Sanses
Well...
Say he tried to take a bite out of a dark apple, but his "dear brother" stopped him. Say Dream offered help with his "friends". Say Nightmare ran. Say he ran, say he ran deep into the forest to never be seen by his brother again.
At least, not as the same person.
Characters or art don't belong to me!
(Drew the cover)