OK i have a Cyber Dragon deck with 3 the light hex sealed fusions. I Special C.D and Normal The Light. If I don't use Polymerization or Power Bond and use Light's effect, I can only bring out Chimeratech Overdragon and not Cyber Twin Dragon. If I do use Polymerization or Power Bond, I can bring out either one. I know Light's effect, but am I missing something?