The Whirlwind Technique Avatar: The Last Airbender: Eternal-Legal Foil card is a collectible card game item from the Magic: The Gathering series. This blue card, with a Lesson creature type and a cost of 4uu, is part of the Avatar: The Last Airbender: Eternal-Legal set and is illustrated by Robin Olausson. Manufactured by Wizards of the Coast in the United States, this instant card has a foil finish and is numbered 100 in the set. Ideal for fans of Avatar: The Last Airbender and Magic: The Gathering looking to enhance their decks with unique and powerful cards.