NewTransformUndead - Table for raising undead.

I understand, but then, for the benefit of Asche, who will the vampires be raised from?!

Vampires are raised from all creatures of tier 4 (succubi, griffins, lizards, shamans, etc.).

It seems you didn't quite understand the mod's concept. The idea is very simple: by killing creatures of a certain tier, you raise creatures of exactly the same tier, but belonging to the Necropolis instead. For example, when killing titans (tier 7), you now raise spectral/astral dragons (also tier 7), whereas in the original game, death knights (tier 6) were raised...