Talk:Rainbow Dragon/@comment-70.209.4.176-20130630114616/@comment-11437884-20130701152834

If you don't have Double Rainbow, Celtic or Leap Year, the smallest fail time is Firefly + Lichen (or any other combo with Lightning, Fire, Cold and Plant elements).

But remember: Rainbow has only 1% probability. If there's another dragon you're looking for, you should try a combo that gives you both.