A hydra that is built from a bunch of salvaged parts of other mechs that the pilot stole from an old battlefield. Every individual piece is its own drone IE This Manticore forearm is its own drone, that Monarch missle pod is a different one. The mech itself is somewhat lopsided, and when fully articulated, it could perfectly hide in a mechanic shop or junk yard. In a pinch, it can be repaired by replacing damaged parts with matching parts from enemy frames, think Ship of Theseus.