The MTB-7 is a single-edged combat blade, 28 centimeters in length, constructed from a segmented ferromagnetic alloy with a hollow spine housing a miniaturized linear magnetic acceleration coil array. When activated, the coil array generates a rotating magnetic field along the blade's long axis, causing the blade's segmented construction to torque microscopically — approximately 0.4 degrees of torsional flex per segment. The cumulative effect along the blade's length is a continuous corkscrew motion at the cutting edge, invisible to the naked eye but mechanically equivalent to a high-speed drill bit at the point of tissue contact.

The torsional motion transforms the MTB-7's wound profile entirely. A standard thrust with a conventional blade creates a linear puncture channel. The same thrust with the MTB-7 active creates a helical wound cavity that expands as the blade penetrates, shredding tissue in a widening spiral pattern. Extraction is equally destructive — pulling the blade free while active widens the wound channel significantly, a feature that operators describe clinically as 'maximizing effect on withdrawal.' Against augmentation casings, the torsional cutting edge can bore through Grade 1-2 subdermal plating that would deflect a conventional blade entirely.

TESSERA CORPONATION produced the MTB-7 under a defense contract that was subsequently classified, which has led to considerable speculation about which branch of the GLMZ municipal authority originally commissioned it. The weapon entered black market circulation approximately 18 months after its presumed initial deployment, suggesting either a supply chain compromise or a deliberate off-the-books distribution strategy by parties within TESSERA. The blade's segmented construction means it can be disassembled into components that individually register as non-weapons on standard scanners, a feature that almost certainly was not accidental.