User blog comment:Purenightmare/Legendary Breeding/@comment-24568135-20140610122132

1.  As long as they are level 4 you should be good.

2. Your are breeding wild card and wild card and anything that is breedable is possible. The likelihood of getting a legend with that breeding combination takes you from 6% overall chance to well below 1% chance.

3.  Yes. There is approximately a 1% chance of getting the Mirror dragon with that or any other Pure/Pure Hybrid combination. It is just luck of breeding tables. I got two in one week and nothing for 2 months since.