This bizarre monster begins its existence in the womb of a zombie, forming a bloated pus-filled cyst until ready to hatch and gnaw its way out of the parent. The core of its body is little more than a gas-filled tumor with a rudimentary brain, but produces a seemingly endless supply of plasma, symbiotic bacteria and living microfilaments; the tarry, amorphous "pus" that serves as the creature's flesh. Its buoyant body floats like a balloon, but it keeps low to the ground and moves by grasping its surroundings. Though this lazy creature prefers to scrounge for carrion, a hungry Lesion may spin its own body into a thick web of pus to ensnare live prey or even other zombies. When several lesion meet, they may dig into the ground and form a living sinkhole.