NHF – new heroes for Heroes V 3.1.

I would suggest not using liches, but Void Spirits, but then two problems arise:
1) The level and abilities of these creatures. 2) The aforementioned conflict with Mirabelle, since her pirates currently occupy the niche of Yetis.

Yes, there are no more slots available. Unless no one uses Black Knights. (Not to be confused with Death Knights, which are used). Therefore, liches are probably a better option.

Another problem arose with the special ability's name. Since it's Sandro, there will be nitpicking about everything. There is no such attitude towards other heroes. Consequently, everything needs to be refined. The icon for the special ability could be something like: a two-faced image similar to the Terminator, where on one side there is a living creature, and on the other, a lich. The transition should be as smooth as possible.