Card Set: Legendary Collection 5D's
Rarity: Secret Rare
Card Type: Monster
Monster Type: Effect
Level: 1
Attribute: Dark
Type: Machine
Subtype: Tuner
ATK/DEF: 0/0
Texto (EN): 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.