Chaos Magical Hats

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When your opponent activates a monster effect, or a Normal Spell/Trap Card: Choose 3 Spells/Traps with different names from your Deck and 1 monster in your Main Monster Zone that mentions "Light and Darkness Ritual". Special Summon the Spells/Traps as Normal Monsters (Spellcaster/DARK/Level 8/ATK 0/DEF 0) in face-down Defense Position (their names become "Chaos Magical Hats" even while face-down), Set the chosen monster if it is face-up, and shuffle them on the field. Then your opponent's activated effect becomes "Destroy 1 monster your opponent controls in face-down Defense Position".