User blog comment:Nmtan/Breed Leviathan Dragon/@comment-14849750-20130814112652/@comment-10760902-20130816083000

When you try +, there are posible matching:
 * Arrow_right.png only
 * Arrow_right.png (no dragon found) return parent dragons: only (War,Light,Pure are elementals that have higher priority than other basic elementals)
 * Arrow_right.png or
 * Arrow_right.png or

So keep trying, a few times, you will sucess :) good luck :)