Koa’ki Meiru Powerhand

Edisonformat.net (Revised, Post-UTW Rulings)

Source: https://edisonformat.net/card?name=Koa’ki%20Meiru%20Powerhand

Edison-Accurate PSCT

Ⓜ 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 Normal Trap in your hand. ① If this card battles a LIGHT or DARK monster, negate that monster’s effects that activate or apply on the field during that Battle Phase, while this card remains on the field.

Card Rulings

Regarding the Ⓜ:

  • This is a Maintenance Cost, not an effect. It cannot be negated.

Regarding the ①:

  • Only the effects of monsters on the field are negated. Effects that activate in other places, like that of Sangan, will not be negated.

  • If this card is destroyed by battle, the ① no longer applies, starting from After Damage Calculation.

  • The effect negation begins when an attack target is declared. If this card attacks “Cyber Valley”, Valley’s effect can be activated, but will be negated, because the effect was activated on the field Valley will be banished, the Battle Phase will not end, no card will be drawn, and a replay will occur.

Edisonformat.com (Historical, Pre-UTW Rulings)

Source: https://www.edisonformat.com/rulings

Card Text

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.

Card Rulings

  • 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.)