Constructors (also called Builders) are a type of leper that enjoy building large mountain-like structures for unknown reasons.
Constructors look similar to The Skinsect, but they are smaller, have 6 legs and their tail ends in a bulb.
Constructors can shoot a cement-like substance out of their tail bulbs. The substance dries almost immediately and has a grey color. Constructors use the liquid to create structures similar to giant ant hills. Their enemy has always been the Molders.