Blue Fire Dragon

Breeding
The can be bred by selecting a Fire Dragon to mate with a cold hybrid dragon at the Breeding Cave/Epic Breeding Island.

Alternately, breeding a Cold Dragon with a fire hybrid dragon can result in a Frostfire Dragon.

Earning Rate
Coin per minute: Level 1: 20 / Level 10: 130

Dragon Earning Rates without boosts.

Boost Calculation Guide to use with the page linked above.