Breeding/Gen I

Generation I: The Elemental Dragons. These Dragons have only one Element, and can be bought for at the store. The old members of this generation are bound to Category 1.

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.

Generation I-b: Archangel (Light), War. These dragons have only one Element, and can be bought at the store. This generation is also bound to Category 4.

Generation I-c: Pure. This dragon have only one Element, and can be bought at the store. This generation is also bound to Category 5.

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. Its just an elmenent now