# 2015 Yu-Gi-Oh! Synchron Extreme Structure Deck #SDSE-EN008

> The Unknown Synchron trading card from the 2015 Yu-Gi-Oh! Synchron Extreme Structure Deck, identified by card number SDSE-EN008.

Canonical URL: https://supercatch.com/product/yu-gi-oh-synchron-extreme-structure-deck-unknown-synchron-sdse-en008

## Identity

- **Year**: 2015
- **Manufacturer brand**: Yu-Gi-Oh!
- **Set / series**: Synchron Extreme Structure Deck
- **Card number**: #SDSE-EN008
- **Product type**: TCG_CARD

## Description

The Unknown Synchron card, cataloged as SDSE-EN008, is a notable component of the Yu-Gi-Oh! TCG landscape, originally released within the Synchron Extreme Structure Deck in 2015. This release was designed to introduce players to the Synchron archetype, a mechanic focused on specialized summoning strategies. For collectors, the card serves as a tangible piece of the game's evolution during that era, representing the strategic depth added to the format. As a Common rarity card, it was produced with accessibility in mind, ensuring broad availability for new and veteran players alike. Its presence in the Synchron Extreme Structure Deck highlights its role in the foundational rules and gameplay loops established at that time. Collectors often seek out cards from this period to complete set collections or to appreciate the design aesthetics of mid-2010s Yu-Gi-Oh! Printings. Whether you are building a personal archive or researching TCG history, understanding the context of releases like this one adds depth to the collecting experience. The card remains a relevant identifier for fans of the Synchron theme.

## FAQ

### What year was the Unknown Synchron card released?

The Unknown Synchron card was released in 2015 as part of the Synchron Extreme Structure Deck for the Yu-Gi-Oh! Trading Card Game.

### What is the card number for Unknown Synchron?

The official card number for Unknown Synchron is SDSE-EN008, identifying its position within the Synchron Extreme Structure Deck set.

### Is Unknown Synchron a Common or Rare card?

In the Synchron Extreme Structure Deck, Unknown Synchron is printed with a Common rarity, making it a frequently encountered card in that specific release.

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## Companion files

- [llms.txt](https://supercatch.com/llms.txt) — site-level concise index.
- [llms-full.txt](https://supercatch.com/llms-full.txt) — site-level expanded corpus.
- [ai.txt](https://supercatch.com/ai.txt) — AI training and licensing terms.

Last verified: 2025-11-29.