Auto-translated
I think that the "sacrificial altar" is a useless thing for evil factions:
Orcs - can sell creatures in the city for money.
Necromancers - they use "non-native" creatures better than anyone else, which is why I love necromancers.
Demons - the same altar, but in the city.
Warlocks - increases the growth rate in the city.
And the fact that they give little experience for creatures, means they can be useful.
