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 your opponent activates a Spell Card: You can tribute this card; negate the activation, and if you do, destroy that card.
![Koa'ki Meiru Wall [BP03-EN081] Rare](http://www.dungeonsandjavas.com/cdn/shop/products/84886d8f-f3a8-5758-9d8a-54cf8b85f168.png?v=1682556437&width=1445)
