Magmine
The Magmine is a robotic creature in the Keen 4 mod Atroxian Realm released by Gridlock.
These slowly sliding technical units follow Keen with their sensible sensors. The electromechanical drones won't harm Keen unless two of them collide with their radiated, electric and magnetic fields. The result of this disturbance causes a pules with a higher energy levels leading to an explosion which harms everything nearby.
These guarding mines are placed in a technical environment and can quite often be found near platforms and doors. Atroxian Base, The Sky Sanctum, Kridonea Ruins and Cargo Transit B are those places where the Magmines guard against intruders.
The in-game help text states: Sensory drones intended to maim intruders. When two of them collide, a large electromagnetic explosion ensues. Don't get caught in the blast radius.
The Magmine is a Inchworm replacement.