User blog comment:CoolM.E/I got Angry and Ruby with a special combination/@comment-14812118-20130808174743

Weird. You were real lucky. Although you should know Legend-element dragons act as wildcards, and, when bred with another non-legend dragon, their son can be any dragon with the 2nd dragon's element, including dragons with three elements such as Poo, Lava, etc (you must have figured it out by now, though).