A thought on the palace of shadow

Hmmm after just recently beating this game, something hit me about the palace of shadow. Why is everything trying to stop you from getting to the shadow queen in the first place? Think about it. Gloomtail was one of the shadow queens dragons. Why would he protect that star key? If he was really loyal, wouldnt he use his massive strength to break out of the room he is in, and then cough that key up? Same could be said about the dark bones. Not to mention all the other enemies in the palace of shadow. The four heros sealed her. Makes sense to me. Did they also create the riddle room with all the keys as well so that no one could get to the shadow queen easily? Maybe they set dark bones up? Just some thoughts on that. Its an awesome game either way.