Static defense

From Liquipedia StarCraft 2 Wiki

Static Defense, sometimes colloquialized as static d, is any immobile object that provides defensive combat capabilities, most commonly referring to buildings. Dedicated buildings require no supply and have vital statistics more cost effective than training army units. (The Bunker is somewhat of an exception, since it has no attack capabilities on its own and requires supply-consuming units inside.)

Being immobile, static defenses only operate in an certain area. Static defenses are often used to fortify a position which cannot be abandoned without serious consequences. A real game application of this could be defending from a rush or pressure play in the early game while attempting to quickly tech up. Common tactics to bypass static defense include drops and other means that allow units to get to a target without being attacked, or simply attacking them with specific offensive units that out-range them (available to all races at a certain tech progression).

Anti-air defenses (Missile Turrets, Spore Crawlers, and Photon Cannons) are all Detectors.

"Static Defense" can also be used in a variety of offensive strategies.



  • Photon Cannons are the main static defense of the Protoss. They detect and can attack ground and air units. They require a Forge. Photon Cannons must be built within the Psionic Matrix and become inoperable if the matrix is removed for any reason.
  • Photon Overcharge (casted by the Mothership Core) is another temporary source of static defense. In Heart of the Swarm, it had the same damage and weapon speed as a Photon Cannon, but has range 13 instead of 7. (Note: Nexus sight range is only 11.) In Legacy of the Void, it has the same range as a Photon Cannon, but a damage of 30 instead of 20.


Both forms of Zerg static defense must be made on creep and have the ability to uproot, move and reroot in a new location. They can only attack and detect while rooted.