In Atergatis if you want to reinforce your hero from village A to village B so the hero produced resources goes to village B and you can send your hero to adventures or attack from village B; you have to build a HeroManssion in village B before you reinforce your hero there. Otherwise hero produced resources will go to village A and your hero will be like other troops that is reinforced to the village B and you have to pull your hero back to village A and then you can send him to adventure or attack.

It makes more sense now when we call it "HeroManssion"