Medieval Dragon and Alphine Dragon
But you can get either Coolfire,Soccer,Armadillo,Platinum
breed penguin + firebird
The Leviathan Dragon is able to defeat a Coolfire dragon in the Dragon City.
you can get a legendary dragon, wind dragon or laser dragon. these 3 are only the ones I know
soccer dragon + coolfire dragon
coolfire dragon
coolfire and soccer dragon
coolfire+armadillo=mirror dragon
Mid-Evil+Alpine
Soccer + coolfire / gummy
gummy and coolfire
breed a gummy and coolfire
gummy dragon and coolfire dragon
lazer+dandelion=coolfire