The AT-DP Arc Cannon Prototype was a prototype Imperial walker designed by Sabine Wren when she was still a cadet at the Imperial Academy on Mandalore. It was named after Duchess Satine Kryze, leader of Mandalore during the Clone Wars. Based on the bipedal All Terrain Defense Pod, the Duchess was fitted with an arc generator of Sabine's invention. That device generated an energy pulse capable of targeting and superheating a specific material whose nature depended on the settings; initially, it was designed to specifically target the beskar alloy found in Mandalorian Armors. At full power and range, it could theoretically annihilate entire armies at a time.
- "Heroes of Mandalore" (Only appearance)