PReDS
Auto-translated
Hmm... I tried, but it didn't work.
I know one way; I had a similar situation in the game a long time ago... So, take a hero, for example, with 1 Dwarf, attack someone... in battle, summon spirits, kill the Dwarf, then the spirits kill everyone, and when only the last stack of neutrals remains, resurrect the Dwarf (BUT! Earth magic must be basic, or the hero must not have Earth magic at all)... the spirits finish off the stack of neutrals, and the hero is left without an army :) ... but with such a hero, you can't attack anyone.