All life was to her was pain and suffer from the equestria war, till she met somepony that showed her that life is not all bad. yet that pony was deeply ill, and died in a fire.
Chaos learned about life being fun till the bitter end, and decided to hide away her deadly magic, years later she had finally received her cutie mark. The power of love and sorrow, good and bad. the wild yin and yang.
fitting music: [link]