You call upon pure destruction. A mile long range in front of you is completely devastated by a rancid apocalypse. This spell fouls rivers, destroys forests and devastates towns and castles. Thousands of innocent lives could be lost. Casting this spell is an unquestionably evil act. Gods take notice, and often warn their followers or send servants to deal with you directly.
You unleash dark energy, a mile-long wave of destruction spreading forward. Rivers bubble with toxins, trees snap and burn, buildings collapse into rubble, and poisonous fumes consume towns and castles, leaving devastation in their wake.