The pitch rig is used for pitch production. It requires a worker, who takes trips between the stockpile and the rig after extraction of pitch is complete. Pitch rigs can be sited in the marshlands, where oil bubbles burst on the surface - siting on swampy areas is illegal.
Pitch can be used as an invisible trap in the form of a pitch ditch, being spread out on a large area, which can be then ignited by a flaming arrow or fire itself. Upon ignition very high flames appear, which damages friend and foe alike: even fire throwers are fried very fast unless removed from the danger zone.
Pitch can also be utilized by engineers, who can carry hot oil in pots and pour it onto the enemy in very close range. An oil smelter operated by an engineer is needed to heat pitch to a very high temperature and portion it into pots.