the egg doesnt tell you when you get it, and its worth "0" points. the only goal involving the egg is winning without collecting it, which involves beating the game avoiding the eight spots around the dragon. hope this helped
I'm not sure what you mean by "0" points. It gives you 3 points, and is critical for going for maximum ending health (best I've done is 13 hearts left, which requires getting the Dragon Egg, all gold treasures, and the Gnome before using a heart).