Board Thread:Breeding Questions/@comment-15956623-20130819202409/@comment-10090661-20130820013706

First off, you can't breed Exclusive Dragons with Elemental Dragons (if you can do so, then we can conclude that the breeding system is broken).

In your example, the only possibilities are Mud and Waterfall Dragons, so the final probability is 50% each. Test it out. :) All you have to do to arrive at the correct calculation is to remove the probabilities of those that aren't possible, leaving you with only the slots that are used.

The slots are filled randomly from the selection of dragons that are in the possible and are in the difficulty group. If the system is totally fair, in your example you will end up with 3 slots with Mud and 3 slots with Waterfall. (The system is generally not 100% fair.) From the filled slots a random dragon is selected. (Again the system is generally not 100% fair.)