User blog comment:Sylvandyr/The math behind the Battle Arena/@comment-69.155.137.157-20130628214428/@comment-4830404-20130629172955

Sorry, forgot to add it but it's there now. Your "best" chance was an Aether. Level 10 Fairy has a 50% chance of winning, so luckily you flipped the right side of the coin! :)