Breeding two dragons of the same Element will always produce an Elemental dragon of that same Element (e.g., breeding two Nature dragons always produce a Nature dragon.) When trying to obtain Hybrids by breeding, some Dragons are more difficult to obtain than others. All Dragons are assigned a Difficulty Group from 1 to 3, e.g.:
- Difficulty Group 1: Sea and Nature
- Difficulty Group 2: Terra and Flame
- Difficulty Group 3: Electric, Ice, Metal and Dark
For more details --> see Breeding System.
Hybrids are obtained by breeding two Elementals of different types. However, as Elementals have only 1 Element, they can't be bred with an Elemental Dragon of the Opposing Element. This makes it impossible to breed a Rare Hybrid (Dragons that have Opposing Elements) without involving a Hybrid.
As of the LaW update, if there are 2 Pure Elements (Pure Dragon or Pure Hybrid Dragons) in the breeding, you have a small chance to obtain a Legend.
As of the LaW Update, Pure Element are no longer "wildcards" in Breeding. It's just an element now