A new and unique x Mangave plant named ‘;Blazing Saddles’; characterized by a rounded mound of fleshy, short, fleshy, linear to lanceolate leaves that develop concentrated reddish to greyed reddish-purple spotting with intense light. The leaves have numerous small, flexible marginal teeth pointing outwardly to recurving toward base. The new plant is suitable for the garden or as a potted plant in the garden or home.