When this card is activated: You can add 1 "Subterror" monster from your Deck to your hand. Once per turn: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position. Once per turn, when an opponent's monster declares an attack: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position, then you can negate the attack. You can only activate 1 "The Hidden City" per turn.
![The Hidden City [TDIL-EN085] Secret Rare | The CG Realm](http://www.thecgrealm.com/cdn/shop/products/c1e6a5a9-3083-57bc-8bcc-8f32f9350333_a082e31c-6ad4-4748-bcd8-448da033beb3.png?v=1707280372)
