There are generally two varieties of Hybrid Dragons that can result from breeding different Elementals. The Elements of the resulting Hybrid does not depend on the order of the parents, although some Hybrids are easier to breed than others.
Note: Gen-II and all its subcategories is the largest category, containing a theoretical 1100 possible Element combinations, not including variants with the same Elements, in the same order (e.g., EX-T Dragons).
Generation II-c: The Pure Hybrid Dragons. These dragons have two Elements, and can be bought at the Store for a large amount of . This generation is bound to Category 5. As the Pure Element has no Opposite at the moment, they can be bred directly with the any Elementals to produce only one possible outcome per breeding.
As the LaW update has missing some Light, War & Pure hybrids, when you try to breed them with Elementals that produces no such possible dragon, the result will be the Archangel Dragon or War Dragon or Pure Dragon again.
Hybrids may be bred together to obtain other Hybrids. If both parents share at least one Element, breeding may also result in an Elemental.
Breeding an Elemental with a Hybrid guarantees one of the Offspring's Element.
Breeding two Hybrids which carry opposing elements may sometimes produce a Rare Hybrid.