Changes

Amazingly, one way to beat the Koa'ki Meiru format is to have the opponent permanently reveal their hand to you on their turns in order to make them either discard an Iron Core of Koa'ki Meiru or destroy the card, since they cannot "reveal" the card to you. Such cards include [[Respect Play]] and [[Ceremonial Bell]]. [[Remove from play]] Decks can remove "[[Iron Core of Koa'ki Meiru]]" and so you have to rely on your revealing effect. It is best to have [[Imperial Iron Wall]] or [[Necrovalley]] in your [[Side Deck]]. The most dangerous are [[hand destruction]] decks. If your hand becomes 0 too quickly, you have limited options. You can draw normally, hopefully getting a Koa'ki Meiru monster, but it gets destroyed, because you cannot add "[[Iron Core of Koa'ki Meiru]]" to your hand. Also, most other Koa'ki Meiru Spells and Traps need "[[Iron Core of Koa'ki Meiru]]" in your hand. [[Side Deck]]ing "[[Morphing Jar]]" and other draw cards can help.

This [[Deck]] revolves around [[Anti-Meta]]. Obviously, the most important card needed in the deck is "[[Iron Core of Koa'ki Meiru]]", so having three in your [[Deck]] would be very helpful. Most of the monsters are used against [[Effect Monsters]], mostly [[DARK]] and [[LIGHT]] monsters, since they are the commonly used [[Deck]]s ([[Dark Armed Dragon]] decks, [[Lightsworns]], etc...). It is best to also have three of "[[Koa'ki Meiru Boulder]]" and "[[Koa'ki Meiru Crusader]]" in your Deck. "[[Koa'ki Meiru Boulder]]" can search for "[[Iron Core of Koa'ki Meiru]]" or a needed Koa'ki Meiru monster. "[[Koa'ki Meiru Crusader]]" can add "[[Iron Core of Koa'ki Meiru]]" from your [[Graveyard]], so you do not have to add it to your hand during the [[Draw Phase]]. "[[Koa'ki Meiru Speeder]]" has a high Defense and if you draw "[[Iron Core of Koa'ki Meiru]]" you can draw another card. While usually this proves itself quite situational, you can abuse the effects of "[[Koa'ki Meiru Hydro Barrier]]" and "[[Koa'ki Meiru Tornado]]".