Yeah a lot of those animals on that page have since been renamed and a lot more common. The Angle of death looks like a Specter/Yellowbelly/Pastel mix or something. Chances are if you go to shows often, you will see one eventually. I don't personally know the name of that morph, but i know that that page is over 3 years old and many of those morphs are just Mystic Potions, Specters, or otherwise.