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Structure Deck: Mechanical Mayhem (known as  STRUCTURE DECK(ストラクチャーデッキ) -機械的騒乱- in the FOCG) is a fan-made Structure Deck. This Deck follows Structure Deck: Tidal Chaos and is followed by Structure Deck: The Creation Burst and Structure Deck: Cosmic Star Alignment.


This 45-card deck focuses on the "VWXYZ" series, including 6 new cards. It also includes 1 Enhancement Pack consisted of 5 out of 10 possible cards, always including 1 special Ultra Rare card that is native to the Structure Deck, 1 Limit Break of the Duelist, and 1 Return of the Light booster pack.

The cover cards: X-Head Cannon, Y-Dragon Head, and Z-Metal Tank.


This deck includes cards of the following rarity:

The enhancement pack includes 5 cards, with ? in total of the following rarity:

Deck List

This deck includes:

Enhancement Pack List

This enhancement pack includes: