Magical Hats (DB1-EN087) [Dark Beginning 1]

Select 2 non-Monster Cards from your Deck and 1 of your Monster Cards on the field, then shuffle your Deck. Shuffle the 3 selected cards and Set them on the field in face-down Defense Position. The 2 cards selected from your Deck are treated as monsters (ATK 0/DEF 0) and are destroyed at the end of the Battle Phase. You can only use this effect during your opponent's Battle Phase.