Unknown Synchron is a Secret Rare Tuner Monster card from Yu-Gi-Oh! (Legendary Collection 5D's Mega Pack, LC5D). Current market price: $0.08.
Secret Rare
Legendary Collection 5D's Mega Pack (LC5D)
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 Special Summon "Unknown Synchron" once per Duel this way.
