Zero-Day Blaster [SDRR-EN033] Super Rare
1st Edition - NM
Not Buying
![Unknown Synchron [SDSE-EN008] Common](https://cdn.shopify.com/s/files/1/0524/2277/0879/products/103914_200w.jpg?v=1608507914)
Unknown Synchron [SDSE-EN008] Common
| Set: | Structure Deck: Synchron Extreme |
| Card type: | Tuner/Effect Monster |
| Rarity: | Common |
If your opponent controls a monster and you control no monsters, you can Special Summon this card (from your hand). You can only use this effect of "Unknown Synchron" once per Duel.