Talk:Rainbow Dragon/@comment-173.182.80.189-20120408222106/@comment-5991203-20120409003505

The most efficent is a combination that includes Metal, Plant, Fire, and Lightning. Either Magnetic + Poison/Flower or Brass + Cactus. The longest breeding time takes 5 hours (Brass). Blue Fire and Crystal is one of the least efficent, as you can get long incubation times such as Crystal (24 hours) or Mountain (14 hours).