If your opponent controls a monster and you control no monsters, you can Special Summon this card from your hand. Each player can only use the effect of Unknown Synchron once per Duel.
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![Unknown Synchron [LC5D-EN022] Secret Rare](https://img.chicumehub.shop/64/3964/2025050718/unknown-synchron-lc5d-en022-secret-rare.webp)
