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 in your hand. Neither player can Special Summon LIGHT or DARK monsters.
How to Get
Sends from hand to Graveyard for cost
Prevents your Special Summons / Prevents your opponent's Special Summons