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. You can Tribute this card to negate the activation of an Effect Monster's effect and destroy that monster.
![Koa'ki Meiru Guardian [RGBT-ENPP3] Super Rare](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/c3a17271-061d-5ccf-ad50-f26c98b5b1d1.jpg?v=1698549108&width=1445)