Koa'ki Meiru

Koa'ki Meiru, sometimes romanized as Core Chimair (a combination of the words "Core" and "Chimera,") is a theme from Raging Battle, Ancient Prophecy, Stardust Overdrive, Absolute Powerforce, and The Shining Darkness. However, the support card "Koa'ki Ring" and other anti-meta cards appear in Starstrike Blast.

The majority of their effects center around manipulating the "Iron Core of Koa'ki Meiru" or revealing one in your hand to activate an effect. Almost all of the monsters require a maintenance cost in the form of sending an Iron Core to the grave or revealing a monster of the same type. There are exceptions, such as that of "Koa'ki Meiru Powerhand", where you must reveal a Normal Trap Card, or "Koa'ki Meiru Valafar" where you have to send an "Iron Core of Koa'Ki Meiru" and cannot reveal any card in your hand instead.

Koa'ki Meiru are all EARTH, WIND, WATER or FIRE attribute monsters, rendering them immune to their own control based effects which often affect LIGHT and DARK monsters. All of the "Koa'ki Meiru" have the same mark (3 dragons) on some part of their body or on a weapon they have. Also, many Koa'ki Meiru and related cards' artwork uses yellow, orange, and red, except for "Koa'ki Meiru Ghoulungulate".

According to "Iron Core Specimen Lab", "Kozaky" and "Magical Scientist" experimented and created the Koa'ki Meiru Monsters.

Playing Style
The theme was initially designed to bring down the dominating Decks of over 2 banlists and therefore centered around heavy control elements. Seeing as the meta was completely dominated by LIGHT and DARK Decks, effects specifically targeted both Attributes therefore bringing about a specific Meta, Anti Meta theme. Because of their high ATK, 11 Level 4 monsters from 1900 ATK, topping out at 3000 ("Koa'ki Meiru Valafar"), and the nature of the new support, the theme has taken a more aggressive approach with powerful beatdown elements, namely "Koa'ki Meiru Rooklord" and "Koa'ki Meiru Urnight".

Generally speaking, there are two ways to use Koa'ki Meiru cards. The most obvious is simply to use a dedicated Deck; the other way is to use individual the Koa'ki Meiru monsters as a supplement to Type specific Decks of their type, giving an Anti-Meta controlling aspect to it as well as being able to maintain it through the alternative maintenance cost; for example, using "Koa'ki Meiru Drago" in a Dragon type Deck as seen in Disaster Dragon builds.

In order to run a Koa'ki Meiru Deck, no matter the style, you'll need multiple ways to retrieve the Iron Core of Koa'ki Meiru from your Deck and Graveyard. Good cards for this include "Koa'ki Meiru Boulder", "Koa'ki Meiru Crusader", and "Core Transport Unit". "Iron Core Immediate Disposal" is also nice mid game after building up resources in your hand. You must also be wary of keeping more on field than you can maintain. Your field should max out at 2 Koa'ki Meiru's requiring maintenance with multiple Cores in play as well as an alternative cost ready in hand. To maintain hand advantage, you could make use of "Forced Requisition": every time you discard a card from your hand for a card effect, your opponent must discard as well-this helps keep your opponent's hand advantage to a minimum.

Beatdown uses a different lineup, using a minimum of control but only the best in the form of "Koa'ki Meiru Rooklord" and "Koa'ki Meiru Drago". The main attackers are "Koa'ki Meiru Bergzak", "Koa'ki Meiru Powerhand" and "Koa'ki Meiru Rooklord". With the addition of "Koa'ki Meiru Urnight" from Absolute Powerforce, you gain a swarm/toolbox element. "Koa'ki Meiru Ghoulungulate" is nice protection but your tribute fodder is best used on Rooklord. Spell/Trap protection is a better option.

You can also play an RFG Koa'ki Meiru Deck. "Ghoulungulate" can protect your monsters while setting you up for "Return from the Different Dimension". Self-Milling elements are recommended to load your grave. The set up takes time so you can use "Royal Oppression" as you aren't in a rush. "Cyber Valley" is also a great asset to the Deck.

Weaknesses
Because "Iron Core of Koa'ki Meiru" may often be in the Graveyard it is vulnerable to cards that can remove it from play such as "Gladiator Beast Retiari" and "Macro Cosmos". Also, having multiple Koa'ki Meiru monsters on the field at once can be extremely dangerous as each one would require you to reveal a card or discard a card from your hand at the End Phase, leaving your hand and field advantage very hard to maintain unless multiple copies are used (for example, 3 "Koa'ki Meiru Powerhands" only require 1 Normal Trap Card revealed). A good way to avoid problems with this is to keep a duplicate of the specific monsters in your hand-usually, Koa'Ki Meiru Monsters require you to reveal a monster of the same type so you can reveal a duplicate or another Koa'ki Meiru of the same type. Koa'ki Meiru monsters are very reliant on the hand and so cards like "Card Destruction", "Mind Crush", or "D.D. Designator" can completely disrupt the player's strategy and cards like "Trap Dustshoot" or even "Des Koala" can deal serious damage.

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. To protect yourself from this, it is a good idea to have "Necrovalley" and a "Burial from a Different Dimension" in your Side Deck.

Hand Control Decks present the biggest threat by being able to specifically remove assets essential to the Deck.

Playing Tips
This Deck revolves around Anti-Meta. Obviously, the most important card in the Deck is "Iron Core of Koa'ki Meiru", so having three in your Deck is a must. Most of the monsters are used against Effect Monsters, mostly DARK and LIGHT monsters, since they are the commonly used Decks (Infernities, Lightsworns, Blackwings etc.). Most Koa'ki Meiru Decks should focus on Rock-Type and Beast-Warrior-Type monsters, using other Types according to the Deck's main strategy.

Often overlooked is the fact that you can use "Iron Core Armor" to substitute for the maintenance cost of Koa'ki Meiru monsters. The main advantage of including "Iron Core Armor" in your Deck is that there exists plenty of support for Equip Spell Cards. For example, using "Hidden Armory" to search for "Iron Core Armor" from your Deck or Graveyard may cause you to have one Koa'ki Meiru monster sent to your Graveyard, which could be used to fuel the effect of "Koa'ki Meiru Ghoulungulate".

"Trade-In" can work well if you are using "Beast King Barbaros" to reveal for "Koa'ki Meiru Urnight" and "Koa'ki Meiru Crusader". Other level 8 monsters to work with "Trade-In" are "Koa'ki Meiru Valafar" and "Koa'ki Meiru Maximus". Maximus can also be revealed for "Koa'ki Meiru Drago" and Valafar is a strong beatstick that is immune to "Torrential Tribute", "Bottomless Trap Hole", "Mirror Force", "Call of the Haunted", and "Core Reinforcement".

It would be wise to include cards that return monsters and other cards to your or your opponent's hand. For example, "Compulsory Evacuation Device" or "Penguin Soldier" can both remove threats from the field or keep a Koa'ki Meiru alive for a turn or even using it for the maintenance.

Usual Anti-Meta tricks like "Grave of the Super Ancient Organism" or "Royal Oppression" work fairly well, since Koa'ki Meirus can mantian a solid game even without Special Summoning.

Although most Koa'ki Meiru monsters have difficulty staying on the field, a few of them work incredibly well together, sharing types or common reveals that help ensure their survival on the field.


 * "Koa'ki Meiru Urnight" and "Koa'ki Meiru Crusader" are Beast-Warrior-type monsters and have the same reveal requirement, while allowing for a good presence on the field and card advantage.


 * "Koa'ki Meiru Wall", "Koa'ki Meiru Sandman", "Koa'ki Meiru Guardian", "Koa'ki Meiru Boulder", "Koa'ki Meiru Prototype" and "Gigantes" can be extremely aggressive when combined, as well as controlling the field and hand. Wall, Sandman, and Guardian all have effect negation abilities: they are used for a Rock Stun deck. Boulder and Prototype are both extremely useful for Koa'ki Meiru monsters because they do not require the normal sacrifice-Boulder is used to search for other Koa'Ki Meiru monsters or Iron Cores, while Prototype can sacrifice itself to prevent a Koa'ki Meiru monster from being destroyed during the end phase of the turn.


 * "Koa'ki Meiru Maximus" can be used as the reveal cost for "Koa'ki Meiru Drago". Drago's effect serves as disruption, while you gather "Iron Core of Koa'ki Meiru" for Maximus's final push for game.


 * "Koa'ki Meiru Doom" and "Koa'ki Meiru Valafar" also work together, usually in a different Deck revolving around "Evil Hero Dark Gaia" and "Dark Fusion".


 * "Koa'ki Meiru Speeder" can null the costs for "Koa'ki Meiru Tornado" and "Koa'ki Meiru Hydro Barrier", as well as working with "Koa'ki Meiru Powerhand" due to their high ATK and DEF and low Levels.


 * "Koa'ki Meiru Ghoulungulate" has a protection effect which can be easily achieved by building up a good Graveyard size with "Iron Core Specimen Lab" and "Koa'ki Meiru Urnight". "Koa'ki Meiru Ghoulungulate" can easily be brought out with Pyramid Turtle's" effect, and keeps a good Tribute fodder for "Koa'ki Meiru Rooklord". Since both Remove from Play, "Burial from a Different Dimension", and "Return from the Different Dimension" can be very powerful.

Finally, a few cards have the heavy cost of discarding a Spell Card from your hand (like "Summoner Monk", "Cursed Seal of the Forbidden Spell" and "Chiron the Mage"), but Koa'ki Meiru Decks can recycle the "Iron Core of Koa'ki Meiru" as long as they want to, making these much more consistent than any other Deck.

Monster Cards
Rock (For Koa'ki Meiru Guardian/Koa'ki Meiru Sandman/Koa'ki Meiru Wall)
 * Gigantes
 * Neo-Spacian Grand Mole
 * Legendary Jujitsu Master

Beast-Warrior (For Koa'ki Meiru Crusader/Koa'ki Meiru Urnight)
 * Beast King Barbaros
 * Chiron the Mage
 * Pitch-Black Warwolf

Warrior (For Koa'ki Meiru Bergzak/Koa'ki Meiru Rooklord/Koa'ki Meiru War Arms)
 * D.D. Warrior Lady
 * Blizzard Warrior
 * Cliff the Trap Remover
 * Dark Scorpion - Chick the Yellow
 * D.D. Destroyer

Zombie (for Koa'ki Meiru Ghoulungulate)
 * Pyramid Turtle
 * Necroface

Spell Cards

 * Hand Destruction
 * Burden of the Mighty
 * Swords of Revealing Light

Trap Cards

 * Grave of the Super Ancient Organism
 * Fiendish Chain
 * Return from the Different Dimension
 * Soul Rope

Monster Cards

 * Koa'ki Meiru Urnight
 * Koa'ki Meiru Crusader
 * Koa'ki Meiru Prototype
 * Koa'ki Meiru Bergzak
 * Koa'ki Meiru Guardian
 * Koa'ki Meiru Wall
 * Koa'ki Meiru Sandman
 * Koa'ki Meiru Boulder
 * Koa'ki Meiru Rooklord
 * Koa'ki Meiru Maximus

Spell Cards

 * Iron Core of Koa'ki Meiru
 * Core Transport Unit
 * Core Overclock
 * Pot of Avarice
 * Giant Trunade
 * Koa'ki Meiru Initialize!

Trap Cards

 * Iron Core Luster
 * Reckoned Power
 * Dark Bribe

Monster Cards

 * Koa'ki Meiru Urnight
 * Koa'ki Meiru Crusader
 * Koa'ki Meiru Drago
 * Koa'ki Meiru Powerhand
 * Koa'ki Meiru Doom
 * Koa'ki Meiru Maximus
 * Koa'ki Meiru Guardian
 * Koa'ki Meiru Wall
 * Koa'ki Meiru Sandman
 * Koa'ki Meiru Beetle (Optional)
 * Koa'ki Meiru Boulder
 * Koa'ki Meiru Tornado
 * Koa'ki Meiru Hydro Barrier
 * Koa'ki Meiru Drago
 * Morphing Jar
 * Summoner Monk

Spell Cards

 * Iron Core of Koa'ki Meiru
 * Core Transport Unit
 * Core Overclock
 * Core Compression
 * Koa'ki Ring
 * Koa'ki Meiru Initialize!

Trap Cards

 * Core Blast
 * Dark Bribe
 * Skill Drain
 * Trap Dustshoot
 * Iron Core Luster
 * Reckoned Power

Monster Cards

 * Koa'ki Meiru Urnight
 * Koa'ki Meiru Crusader
 * Koa'ki Meiru Guardian
 * Koa'ki Meiru Sandman
 * Koa'ki Meiru Wall
 * Thunder King Rai-Oh
 * Neo-Spacian Grand Mole
 * Morphing Jar

Spell Cards

 * Pot of Duality
 * Smashing Ground
 * Book of Moon
 * Mystical Space Typhoon
 * Iron Core of Koa'ki Meiru
 * Gold Sarcophagus
 * Pot of Avarice
 * Giant Trunade
 * Dark Hole
 * Monster Reborn
 * Core Overclock

Trap Cards

 * Reckless Greed
 * Dimensional Prison
 * Bottomless Trap Hole
 * Starlight Road
 * Royal Oppression
 * Mirror Force

Extra Deck

 * Stardust Dragon