Koa'ki Meiru Drago (Quarter Century Secret Rare) (RA03-EN218) - Quarter Century Bonanza 1st Edition

During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the GY or reveal 1 Dragon monster in your hand. Neither player can Special Summon LIGHT or DARK monsters.