As of this deck's submission, it is my first day of Domain Format, so there are many ways in which this deck can be improved, optimized, and overall made to be more focused.
This list aims to abuse 3 things that I found would be crazy when looking at the format:
1. Invoked Elysium as a Deck Master (Also Five-Headed Dragon and Link-Dragon to an extent), as they allow you to bypass one of the bigger limitations of the format: The monsters available for you to use, as Invoked Elysium's domain is absolute- you are allowed yo use any monster on an Elysium deck.
2. The forbidden/limited list, being as of right now, is completely empty. This means that along with DM Elysium, you are functionally playing a Highlander deck on the Traditional list, which means that there are many ways to break it.
3. The 3-axis engine, along with the orcust/knightmare package, which are both completely legal right now due to the conditions I mentioned above. Although it may not be the most effective way to use the orcust line on a Domain deck, I am both very new here, and very lazy, so I just put the cards that make funny cherubini together and hoped that the most effortless way to put material on board would be enough (which it might be, but probably isn't).
All in all, this deck is mostly a proof of concept that aims to show how stupid easy it is to jam orcusts in any deck that doesn't mind running Elysium as the DM, and how consistent it can be besides the clause that limits every card in the pool (i'm not even running Girsu lmao), so here are my final observations.
Invoked Elysium is an absurdly strong Deck Master, and it might allow even crazier stuff than what i'm showing right here (Also partially applies to Five-Headed Dragon and Link-Dragon).
Knightmare Mermaid is a total bore of a card that can allow any half consistent deck in the format to artificially up it's ceilling by a decent ammount.
Better builds of this deck could probably run Summon Sorceress to summon Girsu, the Orcust Mekk-Knight from the deck, but I am not a good enough deck builder to apply that right now.
Number 86: Heroic Champion - Rhongomyniad is a completely legal route you could take with this engine, and in the case of a possible Elysium ban would still work with the Dragons, as you do not need any light monsters to make a deck that can bring him out (Foxy Tune is the only LIGHT in this list).
Predaplant Verte Anaconda is mermaid but for any DARK deck.
Imperial Order and Royal Oppression 's only downside in a 60 card deck is getting beat up IRL by the people you are playing with (or in game if they all decide to focus your floodgating ***.
That's about it, thanks for reading if you did, ask any questions if you may have any doubts, and thanks a lot to ItThatBetrayed4026 and DivinityKing for helping me get used to the rules of the format, and to Quilpreal and loubob for being cool to talk to.