if anyone's interested:
the best way to experience classic wizardry currently is Wizardry The Five Ordeals
https://store.steampowered.com/app/1308700/Wizardry_The_Five_Ordeals/
it's working on wiz 1-4 rules with some fixes. it also supports user made scenarios, in which japs try to break those rules over the knee by introducing custom spells, equipment and monsters