Koa'ki Meiru Sandman (SESL-EN049) - Secret Slayers 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 Rock monster in your hand. When your opponent activates a Trap Card (Quick Effect): You can Tribute this card; negate the activation and if you do, destroy that card.