Leviathan Dragon Breeding Guide
To breed the Leviathan Dragon, you will have to use a sea hybrid and a war hybrid to get it. Below are some combinations that will give you a shot at this rare hybrid.
Colossal(War+Terra) + Mercury(Sea+Metal)
Nenufar(Sea+Nature) + Juggernaut(War+Flame)
Red Woods(War+Nature)+ Waterfall(Sea+Terra)
If you would like to see the full breeding chart, click here.