| Unknown Synchron | |
| Type: | Tuner Monster |
| Sub-Type: | Machine |
| Attribute: | DARK |
| Level: | 1 |
| ATK: | 0 |
| DEF: | 0 |
| Text: | If your opponent controls a monster and you control no monsters, you can Special Summon this card from your hand. Each player can only use the effect of "Unknown Synchron" once per Duel. |
| Password: | 15310033 |
| Printings |
Legendary Duelist: Synchro Storm (LED8-EN049) -
2021-10-28 Synchron Extreme Structure Deck (SDSE-EN008) - 2015-08-28 Legendary Collection 5D's Structure Deck (LC5D-EN022) - 2014-10-24 Extreme Victory (EXVC-EN002) - 2011-05-10 |