Yu-Gi-Oh! - Koa'ki Meiru Guardian RGBT-ENPP3 - 5D's Promo [Rock/Effect] LV4 ATK/1900 DEF/1200 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 in your hand.