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 Rock-Type monster in your hand. During either player's turn, when a monster effect is activated: You can Tribute this card; negate the activation, and if you do, destroy that monster.
![Koa'ki Meiru Guardian [BP03-EN056] Rare](http://www.dungeonsandjavas.com/cdn/shop/products/a6a1c6a4-2796-51d5-bec0-1ef67a57e1a6.png?v=1682559297&width=1445)
