Deck Details and Tips
The key focus of this deck is utilizing your extra deck as tribute fodder for ritual summons. To this end, Shaddols are utilized as an optional lock play, while the Fossils, and Elder Entity are to be used explictly as secondary removal. The Herald and Albaz cards are secondary card advantage for you to further your plays, but are to be viewed as secondary options to the control choices. The level 9 and 10 cards are solely present to be used to multisummon your nekroz ritual monsters, but they are otherwise wholly unimportant to the deck. If you are forced to remove cards from your extra deck by an opponent's effect, these should be the first choice.
The Impcantation engine is present solely as a back up search options in the case where you did not draw any of the nekroz pieces. They are not important to your deck's function and should be viewed as wholly disposable in cases where your engine is online.
The dogmatika ritual monsters are your closer of choice in most games, while also being decent disruption against extra deck combo decks (Fallen of Albaz, Despia, Syncron, etc.). The non ritual engine is a powerful control secondary option in cases where you can not ritual summon, or your running out of steam in a longer game. Use the non ritual cards present to stifle opponent's plays while moving to close out the game.
The most important part of the deck, the Nekroz are present largely to enable you to play Nekroz of Unicore, which is fundamentally a core wincon to your list. If you have Unicore out turn 1, your should have little to no problem outplaying and outvaluing most decks. Brionac is your secondary choice, especially in a go-second state, as he will be very effecient in removal and in baiting out your opponent's negate options.
Lastly, the finishing touch of the deck is the Shaddol Schism. First and foremost, this is always a garnet if it is drawn first turn. This card is best when searched using Shaddol Apkallone as a ritual material, as it will enable you to fusion summon into Shaddol Winda during the opponents turn, giving you a powerful board into their turn.
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Weaknesses
This deck suffers to Kaijus, it can not really outplay it, as the endboard will often be 1-2 creatures that act as floodgates.
It lacks any real way to deal with Floowanderize, and will be completely stifled against them. The same can be said for Monarch decks.
Due to the removal being largely creature based, skill drain is a very serious issue for this deck to play around, it is possible but not something you can reasonably deal with on the board.
Due to not having any form of Link summoning in this list, some more obscure forms of control, Iblee for example, will be incredible hard to deal with.
Lastly, Helios type effects that banish the gy will restrict your options for extending plays, but should be reasonably playable regardless.
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Strengths
When going first you can easily cripple Despia decks.
Synchro decks that rely on key cards in the extra deck will be heavily limited in their options.
The information you can have over the opponent will give you significant advantage in choosing your follow ups.
Link Climbing decks will be heavily limited in their ability to build an end board.
It is very effective at rebuilding boards after being removed, and has access to a multitude of gy effects that will give you advantage against heavy removal based control decks.
This deck is heavily augmentable to fit floodgates, as there are 3 engines present, you can easily change ratios to add in There Can Only Be One, Gozen Match, Summon Limit, or And The Band Played On, depending on your needs.