Fortress/1.03.25

Barbarian
Like most keeps in the game, the Fortress produces the Barbarians' builder and offer some upgrades as it levels up, keeping some of the lower tier units in the game as it goes on. Also like most keeps, it's also large and time consuming to build, and with a new research to be had at each additional level, the Fortress can find things to do that can delay tiring. Fortunately, the Barbarians have nearly no need for crystal (effectively removing one mine type from the list of mines to fill), access to income upgrades in tier 2 and cheap units, which all means the Barbarians don't need to rely heavily on Thralls for mine-filling to carry them into the late game. As such, there isn't much need to build multiple Fortresses in a single base.

Level 5
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