Excess magic use has numerous ways of backfiring, most commonly exploding. Or uncommonly, it could have interesting side effects none could have predicted. So imagine what blasting an evil moon goddess with the mother of all rainbows could result in.
Some things that ponies go through can not be explained in the world of friendship, But we are not in that world are we? Here are the Ponies who went to Tartarus and back (most didn't) and their stories.
Follow Benkei as he tutors Twilight and her friends as their mentor, delves deeper into the true meaning of friendship, and displays his loyalty to his friends by fulfilling his true purpose for being sent to Equestria.
Angel Bunny was a bunny with a fiery temper. A disregard to all those who lived around him, one too many thrown carrots would lead to his imminent demise.