Unknown Synchron
| Name | Unknown Synchron |
| Archetype | Synchron |
| Attribute |
DARK 
|
| Level |
1
 |
| ATK / DEF | 0 / 0 |
| Passcode | 15310033 |
| Status (TCG) | Unlimited |
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.
Expansions
| 2021-10-28 | Legendary Duelists: Synchro Storm | LED8-EN049 |
|
| 2015-08-27 | Synchron Extreme Structure Deck | SDSE-EN008 |
|
| 2014-10-23 | Legendary Collection 5D's Mega Pack | LC5D-EN022 |
|
| 2011-05-06 | Extreme Victory | EXVC-EN002 |
|