A new and unique x Mangave plant named ‘;Desert Dragon’; characterized by a short, rounded mound of fleshy, linear to lanceolate leaves that are wavy, twisted and slightly arching margins and develop glaucous, blue-green with greyed-purple spotting with intense light. The leaves have numerous small, flexible marginal teeth pointing outwardly. The new plant is suitable for the garden or as a potted plant in the garden or home.