A medium range cannon that delivers superior damage over time and also has a significant EMP payload.
A very advanced design, the Mjolnir is technically a magneto-gravitic shell projector, not a standard cannon. The micro capacitors within each shell are able to deliver enough energy to create a localized singularity with a Schwarzschild radius of 1.8 millimeters. The built-in gravitic lens devastates all nearby matter, and creates the dreaded electromagnetic pulse (EMP) effect, disabling the target's weapons and systems.
The Mjolnir Cannon is a large ballistic weapon that does energy damage, the only ballistic weapon to do so.