As the target Offspring possesses Opposite Elements, you can't breed members of this Generation with 2 Elementals. You need 2 Hybrids or Exclusives in order to have a small chance at obtaining a Rare Hybrid.
Breeding together Rare Hybrids can result in any of the dragons expected from breeding together two regular hybrids.
Generation III-b: The Stage 3 Rare Hybrid Dragons. These dragons have 3 elements where two are opposites of each other, and can be bought for gems at the store. This generation varies between Category 2 and Category 3.
Generation III-b is otherwise similar to Generation III.
Note: In order to result a dragon from this generation you will have to unlock Stage 3. It's currently unknown how this process works.
"I note, however, that it appears easier to breed a Gen III-b dragon using a wildcard and a Hybrid that already possesses two of the 3 elements required." (talk) 17:29, August 3, 2013 (UTC)