King's Bounty: The Legend

I don't know if it's a bug or if it's supposed to work this way, but I can defeat any enemy using the Kamikaze spell. It doesn't matter what unit it is; it completely destroys them. Moreover, if there's another unit nearby, it destroys them too, both enemies and allies. The only downside is that it takes three turns to take effect, but using items like the "Box" (presumably a defensive item) and "Ice Ball" makes it work without any problems.