Koa'ki Meiru Valafar (RGBT-EN021) - Raging Battle Unlimited

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. You can Tribute Summon this monster by Tributing 1 Koa'ki Meiru monster. This card cannot be destroyed by the effect of Trap Car