blackbrotherr
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go to any of the garrisons around the city (after collecting the parts, it says something about it)
regarding empathy: I personally don't see any big problems. A hypothetical Orc with a charm, a half-set of mage skills, and empathy does the same thing without any additional conditions. In the case of Karlam, this even looks conceptually good - it turns out to be not only "mutual support" between squads, but also between the hero and the squads. But the chance of upgrading can be revised if necessary.