Koa'ki Meiru Drago

Edison Card Text
① Neither player can attempt to Special Summon LIGHTs and DARKs.
Ⓜ During your End Phase, destroy this card,
unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the GY, or reveal 1 Dragon in your hand.
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
Can Herald of Orange Light negate Drago's maintenance cost?✓
Drago's End Phase maintenance would occur.
No. Maintenance costs do not activate and cannot be negated by Herald.
Do Koa'ki Meiru monsters still check maintenance under Skill Drain?✓
Skill Drain is face-up during the End Phase.
Yes. The maintenance is a cost/continuous requirement and is not negated by Skill Drain.
Rulings
edisonformat.net
● While the ① is applying, "Future Fusion" can't be activated unless a non-LIGHT/DARK is revealed from the Extra Deck.
● While the ① is applying, "Future Fusion" can't Special Summon a LIGHT-DARK monster during the second Standby Phase. In this case, the Fusion Monster will never be Special Summoned (it won't "try again" the next Standby Phase).
● The Ⓜ is a Maintenance Cost. It does not activate, and can't be negated.
● If Iron Core can't be sent to the GY (EG if "Macro Cosmos" is applying), and no Dragon can be revealed, this card is destroyed.
● If "Mind on Air" is applying, you can't reveal a Dragon, so you must send an Iron Core to the GY or else destroy this card.
● If this card is destroyed by battle, its effect stops applying in Substep 6 (“Tragoedia” can't be activated)
edisonformat.com
(M) 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 Dragon-Type monster in your hand. (1) LIGHT and DARK monsters cannot be Special Summoned.
The (M) Maintenance Cost is not an effect. It cannot be negated.
Revealing 1 Dragon-Type monster does not start a chain.
VS. "Brain Control": if your opponent controls your Drago; they can fail to pay the maintenance cost, destroying Drago, before resolving "Brain Control" (returning your Drago).
The (1) Continuous Effect does not activate.
LIGHT / DARK monsters cannot be Special Summoned (face-up or face-down).
Cards / Effects that would Special Summon a LIGHT / DARK monster cannot be activated.
Cards / Effects that MIGHT Special Summon a LIGHT / DARK monster can be activated
Ex: If "Reasoning" would Special Summon a LIGHT monster, it is sent to the Graveyard.
Ex: "Return from the Different Dimension" cannot Special Summon LIGHT / DARK monsters.
KOA’KI MEIRU GUARDIAN
The first sentence of this card is a maintenance cost, not an effect. It does not start a Chain. “Koa’ki Meiru Guardian’s” effect is a Quick Effect.
KOA’KI MEIRU HYDRO BARRIER
Returning “Iron Core of Koa’ki Meiru” from your hand to the top of the Deck is a cost.
If “Koa’ki Meiru Hydro Barrier” is removed from the field or flipped face-down after its effect is activated, the effect(s) of face-up Effect Monsters are still negated.
If your opponent Summons a monster while the effect of “Koa’ki Meiru Hydro Barrier” is being applied, that monster’s effect will be negated.
KOA’KI MEIRU ICE
The first sentence of this card is a maintenance cost, not an effect. It does not start a Chain.
Sending a card from your hand to the Graveyard is a cost to activate this monster’s effect.
This effect targets 1 Special Summoned monster on the field.
Even if a Special Summoned monster is flipped face-down, you can destroy it later with “Koa’ki Meiru Ice.”
KOA’KI MEIRU POWERHAND
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.
The first sentence of this card is a maintenance cost, not an effect. It does not start a Chain.
“Koa’ki Meiru Powerhand” only negates a monster’s effect while they are battling. This means that it only negates effects that activate on the field, or are continuous effects while on the field. Effects that activate in the Graveyard like “Sangan” are not negated.
If “Koa’ki Meiru Powerhand” is destroyed by battle, its effect stops working from that point.
Example: if “Koa’ki Meiru Powerhand” battles “Divine Knight Ishzark,” the effect of “Koa’ki Meiru Powerhand” stops as soon as it is destroyed, and it will be removed from play by the effect of “Divine Knight Ishzark.”
The effect negation ability of “Koa’ki Meiru Powerhand” begins when an attack target is declared. If “Koa’ki Meiru Powerhand” declares an attack on “Cyber Valley,” and the controller of “Cyber Valley” removes it from play, “Cyber Valley” will be removed from play but the controller will not draw a card, and the Battle Phase will not end, because the effect was activated on the field and is negated by “Koa’ki Meiru Powerhand.” (Also, since the number of potential attack targets has changed in this case, a replay will occur.)
KOA’KI MEIRU ROOKLORD
You can Tribute Summon this card by Tributing 1 “Koa’ki Meiru” monster” is not an effect.
Removing from play 1 “Koa’ki Meiru” card in your Graveyard is a cost.
This effect targets 1 or 2 cards your opponent controls.
KOA’KI MEIRU SEA PANTHER
Sending 1 “Iron Core of Koa’ki Meiru” from your hand to the Graveyard is a cost.
This is an Ignition Effect that targets 1 Spell Card in your Graveyard.
KOA’KI MEIRU SPEEDER
Revealing “Iron Core of Koa’ki Meiru” is a cost to activate this effect.
You can activate this effect once for each “Iron Core of Koa’ki Meiru” you draw during the Draw Phase.
If you control multiple copies of “Koa’ki Meiru Speeder” and you draw “Iron Core of Koa’ki Meiru” during your Draw Phase, you can activate the effect of both monsters in a Chain.
KOA’KI MEIRU TORNADO
Returning 1 “Iron Core of Koka’ki Meiru” from your hand to the top of the Deck is a cost. If your opponent Chains “Book of Moon” to this effect to turn a Special Summoned monster face-down, it will still be destroyed. This effect will destroy monsters that have been Special Summoned in face-down Defense Position by effects like “Morphing Jar #2.”
KOA’KI MEIRU URKNIGHT
Revealing “Iron Core of Koa’ki Meiru” is a cost to activate the effect.
KOA’KI MEIRU VALAFAR
The first sentence of this card is a maintenance cost, not an effect. It does not start a Chain. You can use a face-down “Koa’ki Meiru” monster to Tribute Summon “Koa’ki Meiru Valafar” with just 1 Tribute. [KOITSU](1) 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 Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this card's effect, increase the ATK of the equipped monster by 3000 points. (3) 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. (C) (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.)
"Koitsu"'s effect that inflicts damage is only applied to a monster that is equipped with "Koitsu" by "Koitsu"'s effect; "Koitsu" itself, while a monster, does not receive this effect.