Berta, Wise Extrapolator is a promo foil card from the Magic: The Gathering set, Secrets of Strixhaven, classified as an Unknown rarity. Valued at $1.40, it appeals to collectors for its unique foil treatment and thematic ties to the set’s focus on academic magic. With its distinctive artwork and gameplay potential, it holds a niche position in the market, reflecting the ongoing interest in Strixhaven-related cards.