|This card's written lore in the anime was not shown, was too small to read, or was partially or completely obstructed; the lore listed here is a reconstruction based on how it was used, character descriptions of the card, and/or its OCG/TCG lore. It may not be accurate or complete.|
- Japanese: Ｚ－メタル・キャタピラー
- Romaji: Zetto - Metaru Kyatapirā
- Translated: Z-Metal Caterpillar
Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your "X-Head Cannon" or "Y-Dragon Head" as an Equip Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. While equipped to a monster by this card's effect, increase the ATK and DEF of the equipped monster by 600 points. (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)
- Equips self from field
- Treated as Equip Card
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