Photon cannon

The Protoss Photon Cannon is an automated defense structure. It fires an encapsulated antimatter sphere similar to that generated by the Dragoon, which can target air and ground targets. They are enhanced with special sensor technology borrowed from the Observer. Photon Cannons require a link to the Psionic Matrix generated by Pylons.

The Photon Cannon will be replaced by the Phase Cannon in StarCraft II.

Upgrades

 * Plasma Shields