Card Rulings:Koa'ki Meiru Guardian

OCG Rulings

 * The 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 Rock-Type monster from your hand." of "Koa'ki Meiru Guardian" is a Maintenance Cost.


 * Tributing this card is a cost to activate the effect which negates the activation of an Effect Monster's effect.


 * This card's effect is an optional Quick Effect which activates in chain to an Effect Monster's effect when that Effect Monster's effect activates.