Thread:Blyatman1/@comment-37327532-20190731154958/@comment-39205925-20190731205305

The Duchess was an arc generator Sabine made during her time at the Imperial Academy on Mandalore. It targeted the Beskar alloy in Mandalorian armor and fried anyone wearing it caught in the area of effect. It literally distinegrated you inside your armor if the setting was high enough. Sabine built as a challenge to her engineering skills but didn't know the Empire would actually use it against her people. She destroyed it when she realized what she'd created and  fled the Imperial Academy. She named it the Duchess after Duchess Satine Kryze (something that made Bo-Katan almost flip out when she was told.)

It was Sabine's greatest shame because it ruthlessly exploited one of the most sacred tenants of Mandalorian culture (the armor they wear) and turned it into a crippling weakness. There's a really emotional scene in season 4 of Rebels where you see the aftermath of its use (suits of Mandalorian armor with nothing but ash in them, helmets lying across the desert, scorch marks) when Tiber Saxon rebuilt it for battlefield use. He also tortures Sabine, Bo-Katan and Captain Hark with it on the lowest setting which seems to be the equivalent of shocking someone with a car battery. Sabine destroyed once and for all before Tiber's Interdictor Star Destroyer went down with him in it.