The “Koa'ki Meiru” archetype revolves around Iron Core of Koa'ki Meiru; the vast majority of the monsters self-destruct during the End Phase unless you send this Spell Card to the Graveyard or reveal a certain type of card from your hand.
[Skill] description | User |
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The Tie that Binds Until the end of you turn, the ATK of all face-up monsters on your field increases by the number of monsters on your field times 100. This skill can only be used once per turn. | ![]() Common |
![]() Koaki Meiru Maximus | WIND Dragon ★8 ATK 3000 / DEF 2500 |
Gaia Genesis [R] | |
This card cannot be Normal Summoned or Set. This card can only be Special Summoned by removing from play 1 "Iron Core of Koa'ki Meiru" from your hand. During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" or 1 "Koa'ki Meiru" monster from your hand to the Graveyard. Once per turn, during your Main Phase, you can select and destroy 1 card your opponent controls. |
As I said in the Overview, the “Koa'ki Meiru” archetype revolves around a card in particular: Iron Core of Koa'ki Meiru. Iron Core can be recycled from the Graveyard via its effect, so, even if a monster requires you to discard it, you are not going to run out of them, but the case is different with Koa'ki Meiru Maximus because this Level 8 monster can only be Special Summoned by banishing the Spell Card.
If Iron Core is banished, there aren’t many ways to retrieve it consistently. In addition to requiring you to banish Iron Core in order to be Summoned, Maximus doesn’t just ask you to reveal a card during the End Phase: you will have to discard a copy of Iron Core or a “Koa'ki Meiru” monster, otherwise it will destroy itself during the End Phase.
This deck is built to make explosive, aggressive plays, so it generally doesn’t care about maintaining this monster, but, thanks to Diamond Core, you don’t necessarily have to discard anything during the End Phase.
Once per turn, Koa'ki Meiru Maximus allows you to destroy a card your opponent controls. You can destroy a Set Spell/Trap Card or a monster and, if you have more than one Maximus on the field, you can use this effect with both of them.
![]() Koaki Meiru Urnight | EARTH Beast-Warrior ★4 ATK 2000 / DEF 1500 |
Gaia Genesis [SR] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Beast-Warrior-Type monster in your hand. Once per turn, you can reveal 1 "Iron Core of Koa'ki Meiru" in your hand to Special Summon 1 Level 4 or lower "Koa'ki Meiru" monster from your Deck, except "Koa'ki Meiru Urnight". |
Maximus alone isn’t enough to deal with everything your opponent has on the field and, even though it does have a lot of ATK, it’s not going to be enough for an OTK.
Once per turn, Koa'ki Meiru Urnight can Special Summon a Level 4 or lower “Koa'ki Meiru” monster from your Deck, except another Koa'ki Meiru Urnight, if you reveal an Iron Core from your hand.
![]() Koaki Meiru Sandman | EARTH Rock ★4 ATK 1900 / DEF 1200 |
Gaia Genesis [SR] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Rock-Type monster in your hand. During either player's turn, when your opponent activates a Trap Card: You can Tribute this card; negate the activation, and if you do, destroy that card. |
Use Koa'ki Meiru Urnight’s effect to Special Summon Sandman and then Special Summon Koa'ki Meiru Maximus. Now you have a board full of monsters, Maximus’ destruction effect and Sandman’s negation for a Trap Card.
![]() Koaki Meiru Wall | EARTH Rock ★4 ATK 1900 / DEF 1200 |
Revolution Beginning [R] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Rock-Type monster in your hand. During either player's turn, when your opponent activates a Spell Card: You can Tribute this card; negate the activation, and if you do, destroy that card. |
If not Sandman, you can choose to bring out Wall to prevent cards like Book of Moon from stopping your Maximus.
This also stops your opponent from using Mystical Space Typhoon on your set cards if you want to set Book of Moon or any traps you might want to play.
![]() Koaki Meiru Ice | WATER Aqua ★4 ATK 1900 / DEF 1200 |
Gaia Genesis [R] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Continuous Spell Card in your hand. You can send 1 card from your hand to the Graveyard to destroy 1 Special Summoned monster on the field. |
Ice is more of a turn 2 or higher card. Since most strong monsters are most likely special summoned monsters, Ice will most likely be able to deal with a lot of boss monsters.
Unfortunately, this effect does indeed target, despite not being written that way. The good thing is that this can even still destroy face-down special summoned monsters, allowing you to destroy your opponent's monster that you Book of Moon'ed without having to attack.
![]() Star Seraph Scepter | LIGHT Fairy ★4 ATK 1800 / DEF 400 |
Infinite Ray [UR] | |
When this card is Normal or Special Summoned: You can add 1 "Star Seraph" monster from your Deck to your hand, except "Star Seraph Scepter". An Xyz Monster that was Summoned using 3 or more monsters, including this card on the field, as Xyz Materials gains this effect. ● When it is Xyz Summoned: You can target 1 other card on the field; destroy it, and if you do, you can draw 1 card. |
![]() Star Seraph Sovereignty | LIGHT Fairy ★4 ATK 800 / DEF 2000 |
Infinite Ray [SR] | |
Cannot be used as an Xyz Material for an Xyz Summon, except for an Xyz Summon that uses 3 or more monsters as Xyz Materials. If you Normal or Special Summon a "Star Seraph" monster(s), except during the Damage Step: You can Special Summon this card from your hand, and if you do, draw 1 card, then you can Special Summon it if it is a "Star Seraph" monster. |
Star Seraphs works as fillers in the deck. They help with some draw power because of their effects and are used to help make some rank 4s that uses 4 materials.
Scepter searches for Sovereignty from the deck, but if you already have Sovereignty in your hand, you'll be able to special summon the one in hand and the newly searched Sovereignty. This will already give you a +2 draw and 3 monsters on the field.
Once all Star Seraphs are on your field, you can make a Delteros or Ouroboros to activate Scepter's effect to destroy and draw a card before even using the Xyz monster's effect.
![]() Diamond Core of Koaki Meiru | Normal Spell |
Revolution Beginning [SR] | |
Add 1 "Koa'ki Meiru" card from your Deck to your hand, except "Diamond Core of Koa'ki Meiru". You can banish this card from your Graveyard; for the rest of this turn, "Koa'ki Meiru" monsters you control cannot be destroyed. |
Use Diamond Core to add Iron Core of Koa'ki Meiru, Koa'ki Meiru Urnight or Koa'ki Meiru Maximus from your Deck to your hand. You can’t add another Diamond Core to your hand, but there is no restriction on how many you can activate in a turn.
If all of this wasn’t enough, you can banish Diamond Core from your Graveyard to prevent all “Koa'ki Meiru” monsters you control from being destroyed this turn. You can activate this effect the same turn you activated Diamond Core and make your monsters immune to cards like Treacherous Trap Hole, Widespread Ruin and Super Rush Headlong.
Since your monsters can’t be destroyed by battle this turn, you can also safely attack monsters with the same ATK with them. Most of the times you do not want to add Koa'ki Meiru Sandman to your hand with Diamond Core because Koa'ki Meiru Urnight can Special Summon it from your Deck.
![]() Number C39: Utopia Ray | LIGHT Warrior ★4 ATK 2500 / DEF 2000 |
Infinite Ray [UR] | |
3 Level 4 LIGHT monsters You can also Xyz Summon this card by using a "Number 39: Utopia" you control as the Xyz Material. (Xyz Materials attached to that monster also become Xyz Materials on this card.) You can detach 1 Xyz Material from this card; it gains 500 ATK and 1 monster your opponent controls loses 1000 ATK, until the End Phase. You must have 1000 Life Points or less to activate and to resolve this effect. |
Gives the deck an OTK option if your opponent has at least a 3000 ATK or lower monster, and you are low LP.
You can make this with the Star Seraphs or ranking up from Utopia.
![]() Number 39: Utopia | LIGHT Warrior ★4 ATK 2500 / DEF 2000 |
Shining Hope [UR] | |
2 Level 4 monsters When any player's monster declares an attack: You can detach 1 Xyz Material from this card; negate the attack. When this card is targeted for an attack, while it has no Xyz Materials: Destroy this card. |
Mainly to be used to rank up into Utopia Ray when you're at 1000 LP or lower.
![]() Number 70: Malevolent Sin | DARK Insect ★4 ATK 2400 / DEF 1200 |
Photons of Galaxy [SR] | |
2 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card, then target 1 monster your opponent controls; banish it until your opponent's next Standby Phase. At the end of the Damage Step, if this card attacked: You can make this card gain 300 ATK, and if you do, increase its Rank by 3. |
Useful when going against opponents that only have 1 strong boss monster on the field, especially if it's an Xyz monster since banishing them will also remove the materials.
![]() Number 18: Heraldry Patriarch | LIGHT Psychic ★4 ATK 2200 / DEF 2200 |
Voltage of the Metal [R] | |
2 Level 4 monsters Once per Chain, during either player's turn, if 2 or more monsters with the same name are on the field: You can detach 1 Xyz Material from this card; choose 1 monster among those with the same name, and destroy all other monsters with that name. While this card remains face-up on the field, your opponent cannot Summon monsters with the same name as any of the monster(s) chosen for this card's effect. If this card is sent to the Graveyard: You can send 2 "Heraldic Beast" monsters from your Deck to the Graveyard. |
Very strong against decks like Harpies or Cyber Dragons since they use monsters with the same name.
![]() Number 50: Blackship of Corn | DARK Plant ★4 ATK 2100 / DEF 1500 |
Voltage of the Metal [SR] | |
2 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster your opponent controls with ATK less than or equal to this card's; send it to the Graveyard, and if you do, inflict 1000 damage to your opponent. This card cannot attack the turn you activate this effect. |
A monster removal that mostly works on low level monsters, or dangerous monsters with low ATK like Bloom Diva the Melodious Choir.
![]() Stellarknight Delteros | LIGHT Warrior ★4 ATK 2500 / DEF 2100 |
Shining Hope [UR] | |
3 Level 4 monsters While this card has Xyz Material, your opponent cannot activate cards or effects when you Normal or Special Summon a monster(s). Once per turn: You can detach 1 Xyz Material from this card, then target 1 card on the field; destroy it. If this card is sent from the field to the Graveyard: You can Special Summon 1 "tellarknight" monster from your hand or Deck. |
Xyz into this with the Star Seraphs to get a card removal from Scepter's effect, then use Delteros for another.
![]() Evilswarm Ouroboros | DARK Dragon ★4 ATK 2750 / DEF 1950 |
Pendulum Genesis [SR] Selection Box Vol.04 [SR] | |
3 Level 4 monstersOnce per turn: You can detach 1 Xyz Material from this card, then activate 1 of these effects. Each effect can only be used once while this card is face-up on the field. ● Target 1 card your opponent controls; return that target to the hand. ● Send 1 random card from your opponent's hand to the Graveyard. ● Target 1 card in your opponent's Graveyard; banish that target. |
Similar to Delteros, except Ouroboros' effects can only be used once each. Delteros can destroy a card once per turn each turn, but Ouroboros can only remove a card on the field once.
[Skill] description | User |
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The Tie that Binds Until the end of you turn, the ATK of all face-up monsters on your field increases by the number of monsters on your field times 100. This skill can only be used once per turn. | ![]() Jaden Yuki |
![]() Koaki Meiru Powerhand | EARTH Machine ATK 2100 / DEF 1600 |
Gaia Genesis [R] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Normal Trap Card from your hand. If this card battles with a LIGHT or DARK monster, any of that monster's effects that activate or apply on the field are negated during the Battle Phase, while this card remains on the field. |
Effect is very niche, and only works when it battles makes it even more situational. It's better to rely on monster removals like Maximus or the extra deck monsters.
![]() Koaki Meiru Bergzak | EARTH Warrior ★4 ATK 2000 / DEF |
Infernity Destruction [R] | |
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Warrior-Type monster in your hand. If this card destroys an opponent's monster by battle, it can attack once again in a row. |
It will have some difficulty destroying monsters on its own, but if you play any ATK reducing/increasing cards, this can help get an easy OTK on its own.
![]() Core Overclock | Continuous Spell |
Infernity Destruction [R] | |
All face-up "Koa'ki Meiru" monsters you control gain 500 ATK. Once per turn, during your Main Phase, you can discard 1 "Iron Core of Koa'ki Meiru" to have all face-up "Koa'ki Meiru" monsters you control gain 1000 ATK until the End Phase. |
This can help make the deck into a viable beatdown deck with any of the low level monster, or get over strong boss monsters that Maximus can't destroy with its effect.
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