Aitsu Koitsu

Overview

Aitsu Koitsu is an aggro deck that focuses on the fairy duo of Aitsu and Koitsu. The goal is to cheat both into play, equip Koitsu to Aitsu, and beat face.

Both monsters are too high of a level to normal summon, so pilots of the deck usually need get crafty when figuring out how to get them into play. Recruiters UFO Turtle and Mother Grizzly are the most common. Last Will is also played often, though how players choose to trigger it varies. ​Big Wave Small Wave only summons Koitsu, but is also a way to trigger Last Will. 

With so many Water monsters played, Abyss Soldier is a frequently seen beater made better by Mother Grizzly searching for Sinister Serpent. Mirage Dragon, Pitch-Black Warwolf, Kycoo the Ghost Destroyer, and others are also played. 

Because of the nature of the Aitsu and Koitsu interaction, the deck is susceptible to many threats. For example, it is incredibly weak to Both Book of Moon and Tsukuyomi, which completely nullify the pair and are difficult to stop. Removal in general is also a problem, as most games consist of the deck spending a lot of resources in order to make a single threat. If it gets destroyed or banished, it's difficult for Aitsu Koitsu to recover. Solemn Judgement, My Body as a Shield, Spell Shield Type-8, and other protection cards help reduce risk, but do not solve these problems entirely. 

Deck List

Aistu is played in higher numbers than Koitsu here. This is because his trubute summon can activate Last Will, making him much more useful in hand than his Water counterpart. Exiled Force was included because of its synergy with Last Will as well. Mirage Dragon and Pitch-Black Warwolf prevent battle traps from destroying an equipped Aitsu. Breaker and Abyss Soldier more or less serve the same purpose. 

Monsters

2x Abyss Soldier
1x Breaker the Magical Warrior
1x Exiled Force
2x Koitsu
1x Mirage Dragon
3x Mother Grizzly
1x Pitch-Black Warwolf
1x Sangan
1x Sinister Serpent
1x Tribe-Infecting Virus
3x UFO Turtle
3x Aitsu

Spells

2x Creature Swap
1x Delinquent Duo
1x Graceful Charity
1x Heavy Storm
3x Last Will
1x Mystical Space Typhoon
2x Nobleman of Crossout
1x Pot of Greed
1x Premature Burial
1x Snatch Steal

Traps

1x Call of the Haunted
1x Mirror Force
1x Ring of Destruction
3x Solemn Judgment
2x 

Additional Card Options

Players looking for a bit of spice have been known to play KA-2 Des Scissors. Using Creature Swap to trade in Koitsu, then attacking it with Scissors results in over 5000 damage. Ameba also pairs well with Swap, and gives the deck more Water fodder for Abyss. 

Toon Cannon Soldier is an easily found method of activating Last Will. It can also close out games with its burn damage. If included alongside Toon Table of Contents, one could also play Toon Alligator to pair with Abyss Soldier. 

• Aqua Spirit
• Jinzo
• KA-2 Des Scissors
• Nightmare Penguin
• Toon Cannon Soldier
• Toon Alligator
• ​Big Wave Small Wave
• Brain Control
• Cestus of Dagla​
• My Body as a Shield
• Soul Exchange
• Toon Table of Contents
• Formation Union
• Royal Decree
• Spell Shield Type-8
• Torrential Tribute