Thanks for the explanation on what regular Rayquaza C does. I don't think I ever saw that before. If you attach Energy Gain to Rayquaza C, you can do Trash Burst for 0 Energy, correct? It's neat you can actually do something if you happen to begin with Rayquaza C.
I could probably make good use of Rayquaza Lv. X C, since I frequently find myself with no cards in my hand...