The following contains a list of dragon breeding combinations to help you acheive the one you desire. Click on the links to see the different combinations each dragon has.
Two Dragons of the same level usually tend to have offspring of the next level. (i.e. two normals produce elite, two elite produce rare...) In addition, two dragons that only differ by one level usually produce offspring of the higher level(i.e. normal and elite produce elite).
Keep in mind that not all combinations will always give you the specified outcome. Two Original Dragons may end up giving you an egg identical to a parent. The Upper Dragons' combinations are harder to predict as they are composed of a range of types, and can thus give an egg identical to the parent, or an egg comprising of some combination of their basic types.
The dragons below have all been classified based on their habitat and amount of elements regarding the leveling system used in the game.
Normal Dragons (1 Element)[]
Elite Dragons (2 Elements)[]
Rare Dragons (3-4 Elements)[]
Unique Dragons (5-6 Elements)[]
Legendary Dragons (7 Elements)[]
Aurora
Light
Lava
Ancient Dragons (5-7 Elements)[]
Agneed
Azi Dahaka
Bahamut
Imoogi
Jormundgand
Lavender
Leviathan
Nidhogg
Scatha
Tiamat
Typhon
Vrita
Yamata no Orochi