Koa'ki Meiru Doom [BP03-EN058] Shatterfoil Rare

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 Fiend-Type monster in your hand. Negate the effects of LIGHT and DARK Monsters that activate during the Main Phase.