Square Theory

About Me:What makes me qualified to write this? Nothing.  I am a player from Georgia. I have been playing the game competitively since 2013. However at that time I was playing on a budget. I am no longer playing on a low budget and can vastly spend money on any deck I want to. I have played just about every deck online for a period of two to three weeks. So with that said I am here to bring you the monstrosities that I create.

The Square Theory in a Nutshell: Well back a couple formats and months ago a well know player from my state by the name of Patrick Hoban made a article about finding the fourth leg of the triangle (Meta Theory detailing three decks that counter one another and generally the top of the triangle is the best deck. The bottom legs of the triangle are considered to be the meta of formats passed or decks that counter the best deck and the deck that counters the main counter to it but loses to the best deck.) This has become a traditionally accepted fact of the game. People have come to accommodate and power creep what they think has the best chance. Generally not looking back at old decks that have become "un-hit" by the ban list. However the best decks are not always a single archetype. (For those of you may not know this. It is a family of cards that share the same name.) Nor, is the fourth leg always a older archetype or deck. This can be seen when observing the magic formats. Hybrid decks generally gain a nickname or standard name in which they are called. Examples of this vary, but mainly can be seen in hearthstone. In which different families of cards are combined to combo off. So it has become an accepted statement to say that the meta triangle of May 15" consists of Nekroz, Shaddolls, and either Satellarknights versus Burning Abyss.

Revisiting what was previously stated. Archetypes are not always the best decks. The "best" deck would consist of synergy, search ability, consistency, and sheer power. So what if we combined two legs of the triangle to form the fourth leg and complete the square? Generally combining card pools is extremely difficult and can cause the user to build over the ideal number of forty cards per main deck. This is not always bad if done correctly though. For example, when Billy Brake won Yu-Gi-Oh Championship Series Dallas Texas he played Sixty Card Control, the deck he made was a combination of two of the best decks of the time. So why can't we break the triangle again and do this with our triangle?

The answer: We can. I've done it.

The Square Theory Deck of May 15": So the best decks right now are arguably  Shaddoll and Nekroz. So here is the combination of these two. I present you the Monstrosity of Shaddoll-Nekroz


1 Shaddoll Hedgehog

1 Shaddoll Falco

1 Shaddoll Dragon

1 Shaddoll Squamata

1 Shaddoll Dragon

1 Shaddoll Beast

1 Nekroz of Valkyrus

1 Nekroz of Trishula

2 Nekroz of Brionac

2 Nekroz of Unicore

2 Nekroz of Clausolas

2 Shurit, Strategist of The Nekroz

1 Summoner Monk

1 Djinn Releaser of Rituals

1 Farfa, Malebranche of The Burning Abyss

2 Armageddon Knight

2 Manju of The Ten Thousand Hands


2 Forbidden Lance

2 Reinforcement of The Army

2 Shaddoll Fusion

2 Nekroz Cycle

2 Nekroz Mirror

2 Nekroz Kaleidoscope

1 El Shaddoll Fusion

1 Allure of Darkness

1 Foolish Burial

1 Preparation of Rights

1 Raigeki

1 Book of Moon


Side Deck:(Disclaimer- Completely personal preference and can be changed to the player’s play style.)


Kycoo The Ghost Destroyer (2)

Effect Veiler (2)

Maxx “C” (2)


MIrror of The Ice Barrier (2)

Mystical Space Typhoon (2)

Traps: (4)

Mind Crush (2)

Retort (2)


Extra Deck:

1 Shaddoll Shekhinaga

1 Shaddoll AnomaLilith

1 Shaddoll Construct

1 Shaddoll Wendigo

1 Shaddoll Winda

1 Castel, The Skyblaster Musketeer

1 Diamond Dire Wolf

1 Evilswarm Exciton Knight

1 Laval Chain

2 Daigusto Emeral

1 Abyss Dweller

1 Number 80: Rhapsody in Berserk

1 Black Rose Dragon

1 Herald of The Arc Light


What makes this deck apart of “Square” theory? Simply it’s lack of brickability, synergy with main and extra deck, harder to counter, and it’s unexpected. The greatest part about the deck is its’ ability to play like either of the decks it’s made of then turn quickly into the other. Practically makes the opponent quickly change turns to how they are going to counter it. The shaddolls of this format main deck the card Mistake. Which this deck can easily out. Meaning it’s a beast to be reckoned with.

So How Does One Make A Square Based Deck?

A square based deck has all of the following attributes:

  • Consistancy
  • Synergy (Main, Extra, and Side.
  • Power
  • Combo Based
  • Counters Meta
  • Generates Advantage
  • Nearly Uncounterable.
  • High Skill Cap
  • Not Known to The Playing Field.

So, with this in mind. Look at Dragon Rulers. The deck had all of this. It excelled at complicated game states where it had more cards in hand to play with. Dragon rulers filled every detail of the Square Theory. Eventually they became the best deck and were undefeatable. At every format the Square deck has existed but not always used. There has always been the “best deck” and the other decks that try to compete. Being presented with this information, how are you going to change your deck building? How will you try to define formats? Will you follow this new theory and try to innovate? Or will you be another power creep player?


- Till next Time

This has been

Austin Kirkham

Austin Kirkham

Latest posts by Austin Kirkham (see all)