- If the targeted card is a Set Spell/Trap Card on the field, when the effect resolves pick that card up and look at it. (If it is a Spell Card it is destroyed, if it is a Trap Card it is returned to its original position and not destroyed.)
- Even if there are no face-up Spell Cards nor Set Spell/Trap Cards on the field, the effect always activates when "Armed Ninja" is flipped face-up. (Because there is no chosen target, the effect does not resolve.)
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