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.
Unknown Synchron [SDSE-EN008] Common
$0.30Liquid error (snippets/product-price line 23): Computation results in '-Infinity'Unit price
/
Sold out
![Unknown Synchron [SDSE-EN008] Common](http://invasioncnc.ca/cdn/shop/files/103914_a491bf83-57d4-4878-96c7-c4487c9aa241.jpg?v=1730496383&width={width})
