Unknown Synchron [SDSE-EN008] Common

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Set:	Structure Deck: Synchron Extreme
Card type:	Tuner/Effect Monster
Rarity:	Common
Attack:	0
Defense:	0

If your opponent controls a monster and you control no monsters, you can Special Summon this card (from your hand). You can only Special Summon "Unknown Synchron" once per Duel this way.