The Essential Three are three cards used very often in Epic Battle. Each set contains its own version of each Essential Three cards, with its own art in the theme of the set. The three cards are Fusion, Fission, and Blender. The Essential Three card's art does NOT, I repeat, does NOT have to match with its corresponding set when played. For example, I could use a "Marvelous Molecular Masterpiece" fusion card on a "Core Set" creature.