This Dragon Machine is the second stage of the "Thunder Dragon System" that leads to the ultimate technique of the "Thunder Sword". Normally, it cannot be summoned by Zero, who stopped his training midway, but it is awakened by the magical powers of the knight V-Square, who was worried about Zero, and saves him from peril. It can transform into attack mode with the dragon's head standing up.

When the two Dragon Machines are used together, they increase each other's power.