Machine / Effect

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 in your hand. If this card battles a LIGHT or DARK monster, any of that monster's effects that activate or apply on the field are negated during that Battle Phase, while this card remains on the field.

Rock / Effect

If a face-up "Koa'ki Meiru" monster(s) on the field would be destroyed during the End Phase, you can destroy this card instead. When a face-up "Koa'ki Meiru" monster(s) on the field is destroyed during the End Phase, you can Special Summon 1 "Koa'ki Meiru Token" (Rock-Type/EARTH/Level 4/ATK 1800/DEF 1800).

Warrior / Effect

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. You can Tribute Summon this card by Tributing 1 "Koa'ki Meiru" monster. When this card is Normal Summoned, you can remove from play 1 "Koa'ki Meiru" card in your Graveyard to destroy up to 2 cards your opponent controls.

Rock / Effect

During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the GY or reveal 1 Rock monster in your hand. When your opponent activates a Trap Card (Quick Effect): You can Tribute this card; negate the activation, and if you do, destroy that card.

Sea Serpent / Effect

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 WATER monster in your hand. Once per turn, you can send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard to return 1 Spell Card from your Graveyard to the top of your Deck.

Activate only when your opponent's monster declares an attack if you have 2 or more "Iron Core of Koa'ki Meiru" in your Graveyard. Destroy all face-up Attack Position monsters your opponent controls.

Machine / Effect

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 Machine-Type monster in your hand. If you draw "Iron Core of Koa'ki Meiru" during your Draw Phase, you can reveal it to your opponent to draw 1 more card.

Rock / Effect

If a face-up Rock monster you control is sent to the GY (except during the Damage Step): You can Special Summon this card from your hand. If this card is Special Summoned: You can add from your Deck to your hand, 1 "Iron Core of Koa'ki Meiru" or 1 card that mentions "Iron Core of Koa'ki Meiru", except "Koa'ki Meiru Supplier". You can only use each effect of "Koa'ki Meiru Supplier" once per turn.

Winged Beast / Effect

You can return 1 "Iron Core of Koa'ki Meiru" from your hand to the top of the Deck to destroy all Special Summoned monsters your opponent controls.

Beast-Warrior / Effect

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".

Fiend / Effect

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. You can Tribute Summon this monster by Tributing 1 "Koa'ki Meiru" monster. This card cannot be destroyed by the effects of Trap Cards. During battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.

Rock / Effect

During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the GY or reveal 1 Rock monster in your hand. When your opponent activates a Spell Card (Quick Effect): You can Tribute this card; negate the activation, and if you do, destroy that card.

Warrior / Effect

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. Once per turn: You can target 1 Level 3 or lower Warrior-Type monster in your Graveyard; equip that target to this card. This card gains ATK equal to half the combined ATK of the monsters equipped to it by this effect. If this card would be destroyed by battle, destroy all monsters equipped to it by this effect instead.

Reveal 1 "Iron Core of Koa'ki Meiru" in your hand to select 1 face-up monster on the field. Destroy that monster, and both players take 1000 damage.

Beast / Fusion / Effect

"Sea Koala" + "Tree Otter"

You can send 1 Beast-Type monster from your hand to the Graveyard to target 1 monster your opponent controls; destroy it.

Fairy / Union

Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your "Aitsu" as an Equip Spell Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. While equipped to a monster by this card's effect, increase the ATK of the equipped monster by 3000 points. When it attacks with an ATK that is higher than the DEF of a Defense Position monster, inflict the difference as Battle Damage to your opponent's Life Points. (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)

Warrior / Normal

A man-hunter with powerful arms that can crush boulders.

Fairy / Spirit / Effect

Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by controlling a Spirit monster. You can only Special Summon "Konohanasakuya" once per turn this way. Once per turn, during the End Phase, if this card was Special Summoned this turn: Return it to the hand. Once per turn, during the End Phase: You can banish this card from your GY, then target 1 Spirit monster you control; neither player can activate that face-up monster's effects on the field for the rest of this turn.

Fairy / Effect

If there are face-up monsters with the same name on the field, destroy those monsters. (If a monster is Summoned or flipped-face up that has the same name as a monster that is already face-up on the field, the new face-up monster is destroyed. If they are Summoned or flipped face-up at the same time, they are all destroyed.)

Dragon

A vicious, fire-breathing dragon whose wicked flame corrupts the souls of its victims.

Fiend

A workaholic fiend who devotes everything to his research into the languages of Dark World. His mind has collapsed because of working too hard.

Inflict 1000 damage to the player who destroyed this Set card.

Machine / Effect

Once per turn, during the Standby Phase: You can Special Summon 1 "DOG Fighter Token" (Machine-Type/DARK/Level 6/ATK 2000/DEF 2400). If this card is destroyed by battle or card effect and sent to the Graveyard: You can banish this card from your Graveyard; Special Summon 1 Level 5 or lower "Kozmo" monster from your Deck.

Machine / Effect

If this card is Normal or Special Summoned: You can target 1 monster on the field; destroy it. Your opponent cannot target this card with card effects. If this card is destroyed by battle or card effect and sent to the GY: You can banish this card from your GY; Special Summon 1 Level 7 or lower "Kozmo" monster from your Deck.

Machine / Effect

Cannot be targeted by an opponent's card effects. During either player's turn, when a Trap Card is activated: You can banish 1 "Kozmo" monster from your Graveyard; negate the activation, and if you do, destroy that card. If this card is destroyed by battle or card effect and sent to the Graveyard: You can banish this card from your Graveyard; add 1 Level 8 or lower "Kozmo" monster from your Deck to your hand.