- This effect targets 1 face-up Gemini Monster you control. It turns the monsters face-down upon resolution.
- If your opponent attacks your face-down Gemini Monster and activates a card like "Rush Recklessly" during the Damage Step, you can Chain with "Gemini Counter." If you do, the Spell Card will be negated and the attack target monster will be flipped face-up again immediately.
- The Gemini monster is turned to face-down Defense Position when resolving the effect of "Gemini Counter". This card has no activation cost.