Action Figure file card: Sgt. Thunderblast chose artillery as his field because it's both complex and simple. Complex, because mastering the intricacies of advanced technology is essential to the job. Simple, because you aim, fire - and get instantaneously explosive results. Serial Number: 135-30-MH94. Grade: Staff Sergeant (E-6). Preferred Weapon: Mounted Anti-Armor Rocket Launcher.