The forge is a site of protoss technological development. Although their technology is incredibly advanced when compared to that of other species, the protoss constantly strive to enhance and refine their weapons and armor. Work at the forge rarely ceases, as this edifice is where much of the research takes place.
Forges come equipped with an array of power crystals lining the interior to power operations on the inside. The forge also has no entrance, and protoss engineers are warped directly into the structure.
All protoss commanders gain ground upgrades at the forge. Karax unlocks upgrades for his static defenses at the forge when he reaches Level 6. Alarak unlocks upgrades for his hero unit at the force when he reaches Level 14.