Propagator

A Propagator is a shapeless lifeform that appears in Co-op Missions, in the mutator Futile Resistance.

Overview
Propagators use the model of a Changeling, albeit larger and is colored green in parts of its body. It is found in the exclusive Futile Resistance mutator, where it is said that unidentified lifeforms are consuming everything in its path. In game, it has 500 health and is identified in the minimap as an exclamation mark in a circle. It attacks in a very short range (but longer than melee range) and instantly kills even the toughest units the players can produce, transforming them into another Propagator. This applies to structures and even aircraft, so players must be very cautious when sending melee units to it. Bursting it down before it attacks or even micro can be good strategies when taking down Propagators, since it moves slower than most units in game, but it can outrun anyone affected with the Concussive Attacks debuff and effortlessly finish off a chunk of a player's army affected by the Temporal Fields.