Passcode: 15310033 Set: Synchron Extreme Structure Deck ATK/DEF: 0/0 Card Number: SDSE-EN008 Monster Type: Machine Rarity: Common Attribute: Dark Card Text: If your opponent controls a monster and you control no monsters , you can Special Summon this card (from your hand). You can only use this effect of "Unknown Synchron" once per Duel. Level: 1 Card Type: Tuner monster Name: Unknown Synchron Edition: 1st