Mistform Shrieker is a foil card from the Onslaught set of Magic: The Gathering, classified as an Unknown rarity. Currently valued at $0.42, it appeals to collectors looking for unique cards from this popular set. Its shapeshifting ability and strategic utility in gameplay contribute to its interest among players and collectors alike, though its market presence remains modest. As part of Onslaught, it reflects the set's focus on tribal synergies and creature versatility.