Your search for "Rainbow Overdragon LED2-EN037" revealed the following:
Rainbow Overdragon - LED2-EN037 - Super Rare - 1st Edition
Legendary Duelists: Ancient Millennium 1st Edition
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Rainbow Overdragon - LED2-EN037 - Super Rare - 1st Edition from Legendary Duelists: Ancient Millennium 1st Edition, available at 401 Games Canada. Rarity: Super Rare Card Text:7 "Crystal Beast" monsters(This card is always treated as an "Ultimate Crystal" card.)Must be...