[Fal]

Under what cicircumstances would you use Acid storm? it appears to be such a potent spell but I can't think of a way to counter it. or to cast appropriate protection spells on my army to counter acid damage.

I suppose it would be useful to cast this spell on an advancing heavily armored army with your lone mage, which would destroy their armor while sacrifice your mage. But maybe there are more obvious use of this spell?