The turret is meant to supplement bunkers. Perdition turrets automatically burrow underground when not in combat, and automatically unburrow to engage. They are fairly cheap and fast to build for their damage output, and can provide strong close-range protection to supplement the marines and siege tanks the player is likely using for defense otherwise. They are most effective against zerglings due to their bonus against light-armored units and low range. Against terrans and protoss their uses are more limited, as zealots are much more durable, and terrans do not make use of melee units save the firebat.
This turret fires a deadly wall of flame that is ideal for holding off large waves of enemy units. The turret also conceals itself beneath the ground when out of combat, luring unsuspecting enemies into its field of fire. The zerg's ability to burrow has allowed them to massacre countless terran soldiers in deadly ambushes. The new perdition turret should help even the score.
All structures repair themselves to 50% life. All structure fires are automatically put out.
This all-in-one safety system automatically dispatches robotic drones to put out any fires and perform basic repairs on damaged structures. Although these drones are effective at doing basic repairs, they do not have a strong enough AI to perform the more delicate repairs needed to restore a structure past half life.