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Regarding the Void creatures, I have an idea. There was a Polish mod with creatures from Disciples 3; or we could wait for them to finish it and port it (but that's not our style, it's too easy).
We could take some creatures from there and some from the mod mentioned at the beginning of the topic (the one where there are no archers, but on the 5th level, there are cool undead Rakshasas).

I'll add various trinkets from the Polish ghoul to the upgrade; an alternative upgrade will be a mummy.
2) Void spirits are also in NCF.



Some armor or weapon elements can indeed be taken from the Polish mod