Yu-Gi-Oh

Ahhh King Atumus, a hell of an engine, one of the 2 XYZ monsters of the archtype. this is also the 2nd portal to the OTK thie first being Tefnuit.

Uhmm pretty much you may not follow this build but this is my build for safer gameplays, but first im gonna run through my main deck first since i haven`t introduced the extra deck.

Wattdragon is the 2nd most important card on the build, Tefnuit being the 1st. this is the monster you want to special summon in case a hieratic dragon is tributed.

Card Car D, a good old buddy. this card comes in handy when you get to be the first and not having a good hand or otherwise, a DEAD DRAW. especially when you do not get tefnuit, eset, convocation or supremacy in your hand.

Ahhhh Overlord Seal, this card is capable of summoning powerful Rank 8 XYZ monsters, THUS useful for summoning NGEPD, Thunder End Dragon, and of course the most powerful card of the archetype, Hieratic Sun Dragon Overlord of Heliopolis

You may not run this card at all but since you ran a GEPD why not run 1 or 2?

Ahhh... a good friend. GEPD a very very very compatible card with hieratics since it can be special summoned by tributing 2 monsters with 2000 atk or more and hieratic dragons do have that high atk and of course special summoning 2 dragon type normal monsters which is Hieratic Seal of the Sun Dragon Overlord to overlay for the ultimate XYZ monster, Neo Galaxy-Eyes Photon Dragon :D

The main engine of the deck or perhaps the secondary, hieratic dragons were once tier 1 when this card was available at 3 but now hieratics rank 2nd in the tiers and REDMD is limited to ONLY ONE.

man, do i need to tell you all about this card? 

Nebthet dragon has a similar ability with Su dragon, but instead of destroying spell and trap cards, it destroy monsters by tributing a hieratic monster from either HAND or FIELD. he has similar abilities with Master Hyperion from Agents, Grapha from Dark Worlds and High Priestess of Prophecy from Prophecies.