Koa'ki Meiru Gravirose (ANPR-EN083) - Ancient Prophecy 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 or reveal 1 Plant-Type monster in your hand. During each of your Standby Phases, you can send 1 Level 3 or lower monster from you