Discussion of the Necropolis faction.

Yes, the 2nd level of the faction skill can be obtained at level 5 of the hero, the 3rd - at level 15, and the 4th - at level 25 :(. But I often reached the final level at level 10, as the level increases very slowly after the fifth level :(.

By the way, the effectiveness of Necromancy also depends on the size of the army! That is, the more troops there were, the more could be resurrected!