Heroes of Might & Magic III: Horn of the Abyss

When Ar and I were developing Nygon, I looked up some synonyms in a thesaurus.
Here are the synonyms for "shaman": vedun, volkhv, vorozhey, vrach, vrachevatel, колдун, konoval, lekar, travnik, tselitel, shaman, sheptun...
Choose what you like, although in my opinion, a shaman is a mage who communicates with spirits, so the upgrade should have a similar name: Invoker of Spirits, Speaker with Spirits... I don't know, something related to spiritualism -> spiritualist...