Souls

Souls are the livelihood of the Goblin clans. Without them, they cannot exist.

Information
What souls are is never expanded upon in Goblin Commanders. It is only known that they are needed to generate more units, perhaps to generate goblin life itself.

Soul Fountains
Soul Fountains are structures within the world that generate souls every few seconds. These souls can be used to create units. Fountains can belong to the player, the enemy, or be neutral. Like many other structures in the game, they can be captured by defeating any opposing units and simply standing in their presence.

Conflict
Killing enemy units generates souls.

Soul Caches
In The Swamp, soul caches are able to be used by the player in the absence of souls fountains. Once the fountains are free from the scourge of the Plaguespitter controlled parasitic plants, they are never seen again.