Card Rulings:Koa'ki Meiru Drago

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 Dragon-Type monster from your hand." of "Koa'ki Meiru Drago" is a Maintenance Cost.