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.