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- Japanese: エンジンチューナー
- Romaji: Enjin Chūnā
Viz Media lore?: A monster equipped with this card cannot be switched to Defense Position. The equipped monster has its ATK increased by an amount equal to half of its DEF. When the monster equipped with this card is destroyed, this card remains on the field and can be activated again during your Main Phase.
- Prevents Battle Position changes
- Stat changes
- Equipped gains ATK