Teng
17
In fact, there is another way to get a thrall - buy it.
Currently, only low-level thralls can be purchased in the game.
But in the Age of Calamitous mod you can buy very strong warriors, almost the strongest. Commodity-money relations are well developed there, and they have their own convertible currency. But in battle it is almost impossible to knock out warriors; you need to bludgeon a strong warrior for about 5 minutes, while they very rarely appear, and then only in the company of a dozen hefty soldiers.