Target materials to eat them, dealing damage on touch. Eating makes it grow. Has 3% chance to spawn 10 seconds into a wave. Mutation 0: Fast but fragile. Killing it makes it drop all the materials it ate. Mutation 1: Loses speed but gains max HP. Killing it makes it drop twice the amount of materials it ate. Mutation 2: Loses more speed but gains even more max HP. Killing it makes it drop three times the amount of materials it ate.