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and in my opinion, it works well for humans; it suits them. It just needs to be reworked so that it acts as support for the Orcs, meaning you place it on any of your units, and when they attack, the hero attacks as well.
Added 1 minute ago
but what is there to implement? There's only 1 slot for a level 7 unit, and if you build dragons or angels, there will be no room to build anything else, or does the concept itself not allow adding two such buildings?