I'm halfway through the chaos campaign in Etherlords 2 and I really like the game so far. However, there is something I just can't figure out.

On my way to the kinet peninsula I'm trying to use my newly aquired rain of stones spell against some synthet creatures while fighting an enemy named cutter man. However, for some reason the enchantment doesn't do any damage. I tried it both against creatures with regeneration and without. The spell just dissipates without having any effect whatsoever. What am I missing?

I finally figured it out.

Because rain of stones is an enchantment spell, it doesn't do damage directly. Once it is cast you can access the spell via the enchantment menu (press e, while the hero is selected).