Nightshade was a normal, happy colt. He had a bright future in magic ahead of him, he was strong, and had great shadow power. So it only seemed right that he would help out in his community. As he was building a house, he swung a two by four around as Derpy was walking by, and hit her in the face. her eyes never refocused and as punishment, Celestia had Luna enter his dreams and show him his worst fears ten times over. Nightshade's mind broke, and he woke up insane.