To start off by pointing out the obvious, the episode title, Dragons and Dungeons, is a pun on the popular Dungeons and Dragons game. A quick note on the Gem Dragons, for those who don’t know Hyozanryu, the one that seemed out of place, since its name isn’t the the name of a gem, its Japanese name is Diamond Dragon, a name that I personally like much better, and would fit a lot better. The riddle given by the Dragon Piper might have seen a little random having the answer be the Hieratic Seal of the Sun Dragon Overlord. That was my attempt to make a reference to the Hieratic archetype, because they’re my all time favorite archetype and deck (Not the stupid Hieratic Rulers that everyone’s using these days, I use the good old fashioned Rank 8 summoning Hieratics, what Hieratics were designed to do). Lastly, the Five-Headed Dragon battle at the end of the survival duel was meant to be a reference to the original Virtual World Arc.
***End Spoiler Alert***
Until next time, duel on!