Fiendish Duo is a card from the Magic Foundations Jumpstart set of Magic: The Gathering, categorized under the Unknown rarity. As of now, it holds a market value of $1.41, positioning it as an accessible option for collectors and players alike. The card's unique abilities and artwork contribute to its desirability, reflecting the diverse themes present in the Jumpstart set. Current sales data indicates steady interest among fans, suggesting its potential for future appreciation.