Searing Rain

Searing Rain is one of the most destructive spell known in the Age of Armageddon. Casting it causes a thick rain of pure, concentrated acid to pour down in a wide area surrounding the caster, who himself is protected from the acid. The rain keeps going until dismissed or mana runs out. In this horrible inferno, next to nothing can survive and even the greatest creatures die a horrible death.

Needless to say it is strictly forbidden to cast it in inhabited areas. Also, it can only be cast while being ouside enclosed spaces or buildings.