The Mutator is a improvised weapon in Resistance 3 which harnesses an infectious biological agent. It was created by Herbert Sawicki and designed to fire a weaponized strain of the Chimeran Virus extracted from rampant feral Leeches, so the Mutator won't work against them. The Mutator's primary fire shoots a globule causing bulbous cysts to appear on the enemy and mutating the enemy into a combustible land mine. Charging the Mutator causes faster infection of the victim. The secondary fire unleashes a diseased mist that disorients and infects large groups of enemies caught inside.