When an opponent's monster declares an attack: You can send this card from your hand to the Graveyard, then target 1 FIRE Fiend-Type monster in your Graveyard, except "Red Mirror"; add it to your hand. If you Synchro Summon while this card is in your Graveyard (except during the Damage Step, or the turn this card was sent to the Graveyard): You can add this card to your hand. You can only use each effect of "Red Mirror" once per turn.
If it was just for Red Gardna they'd restrict it on the card text. It's clear they love burn decks, which is bizarre as it's the opposite of playing their very game. They downright suggest Lava Golem in almost all tower challenges, and they keep releasing support for him (especially this and Curse of the Circle).