The deck is pretty easy to understand and has a linear play style. You don't necessarily need an extra deck, it mostly just filer at most parts except few cards.
The idea of the deck is very simple, Banish everything. When I mean everything I mean everything. I wish
Macro Cosmos and
Dimensional Fissure was as at 3 again so I can have D.D. Survivor in this but we gotta do what we gotta do.
I will tell you why I choose all these cards:
Main deck (40):
Monsters(17):
3x -
Gren Maju Da Eiza: The main start of this deck, you get him out as a huge beatstick after Banishing your entire deck, it doesn't matter if your cards are face-down or face-up while Banish. It gets 400 x any cards banished, whether or not is your cards or your opponent's. It is a 3 star so it is easy to normal summon but it lacks protection.
3x -
Necroface: Necroface: is a perfect target for
Allure of Darkness and
Gold Sarcophagus. Why? Because if it is banished, you and your opponent have to banish the top 5 cards from their deck. Also since you are going to be banishing a lot of cards and in order to recycle your whole deck, you can normal summon it and it turns into a huge beatstick based on how many cards being shuffled back into the deck x 100.
3x -
Eater of Millions: you special summon this by banishing cards from your extra deck, or from hand/field face down and it gains x 100 for each card's banished face-down. It is also a good floodgate control to banish your opponent's problematic monsters by banishing them facedown, and the only true way for your opponent to really get rid of it is by non-target removal/effect removal, attacking it twice (losing 1 monster while they are at it), negate its effects/summoning.
3x -
D.D. Scout Plane: you get this little guy banished face-up, he is basically your T
reeborn Frog that comes around during the End Phase, the downside it will come back in attack position but it helps you get some short of field presence when need it and a good target to banish with
Allure of Darkness.
3x -
Battle Fader: you aren't playing many monsters and you might banish your key cards. It is also a good stall option that banishes itself or used as link plays if it lives.
2x -
Gizmek Orochi: you can special summon this on your opponent's turn by banishing 8 cards and it banishes 1 card they control face down by banishing 3 cards from your extra deck. It can also special summon itself from the grave which is also useful.
Spells(16):
3x -
Allure of Darkness: you are running a lot of dark monsters, and you don't really mind banish them. Helps with the consistency of your deck.
3x -
Pot of Desires: Same reason as
Allure of Darkness, it adds consistency, and your monsters benefit from cards being banished faced-down.
1x -
Pot of Extravagance: Same reason as
Pot of Desires but I only suggest one of, because it hinders your other draw power cards.
3x -
Pot of Duality: You aren't going to be special summon that much in this deck, but getting out key cards faster is important.
1x -
Upstart Goblin: makes you have a 39 card deck, and the downside isn't minimal when you can drop 8000 atk or higher
Gren Maju.
1x -
One Day of Peace: It is a good stall card, though it gives your opponent a +1, it is more for consistency.
1x -
Called By The Grave: just get rid of Hand Traps or banishing a card from your opponent's deck.
1x -
Harpie's Feather Duster: you don't have much protection from backrow, there are few decks that do run backrow so is better safe than sorry.
1x -
Gold Sarcophagus: Banish your
Necroface and watch your opponent cry, it is your
Foolish Burial.
1x -
Dimensional Fissure: This deck needs cards to be Banished and it is a perfect anti-meta card, sadly you can only run 1.
Traps (7):
1x
Macro Cosmos: Same reason as
Dimensional Fissure.
3x
Evenly Matched: "At the end of the Battle Phase, if your opponent controls more cards than you do: You can make your opponent banish cards from their field face-down so they control the same number of cards as you do. If you control no cards, you can activate this card from your hand." You need this for your deck, sadly if you are trying to build this deck, it is more pricy at the time writing this, it is around $23. But it might get a reprint soon. You can look up alternatives for this card, and you don't 100% need it. It is nice to have.
3x
Solemn Judgment: Getting rid of problematic cards.
Extra Deck (15):
Your extra deck is pretty much filler, The only cards that are worth running for my take are
Linkuriboh, Relinquished Anima, Knightmares. I have
Staving Venom Fusion Dragon because I side deck
Super Polymerization and
Radian.
Side Deck (15):
I am still experimenting what to side so it is up to you.