Board Thread:Dragon Story Breeding/@comment-26821240-20150906193957/@comment-26845384-20151005181727

So just to clarify (in case it is necessary):

If you use 2 eligible dragons that are both level 15 to get your Diamond dragon (or other dragons), you could be adding one or more of the various Prime dragons to the possible results - this would decrease your chances to get the particular dragon you are after.

Probably not by much, though this decrease can be avoided by using one or both of the parents at a level of 14 or under.