Exterminatus

9th-level evocation (Cleric)

Casting Time: 3 hours (Ritual)

3 hours (Ritual) Range: 10 miles

10 miles Components: S, V, M (50 weapons of iron, which are stabbed in a circle around the caster)

S, V, M (50 weapons of iron, which are stabbed in a circle around the caster) Duration: ten minutes

The caster spends 3 hours walking clockwise within the circle of weapons they have placed, while thinking of a location, which is in the same plane of existance as the caster, within their mind. Upon completion of the spell, the area within a five mile radius of the location thought of begins experiancing heavy thunderstorms and rains.

These rains and winds mean any creature outdoors, and within the radius must make a DC 15 dexterity saving throw each turn or fall prone.

This continues for 10 minutes, after which a beams of holy energy crashes down from the cloud, dealing 10d10 fire damage, 2d10 force damage, and 30d10 radiant damage within the affected area. This damage is usually enough to kill every living plant and creature within the affected area, along with man made structures. Normally mountains are leveled, lakes and rivers dried and rerouted, and the top layers of dirt broken down to the stone.

The casting of this spell is a heavy duty, and usually only used in cases in which the caster believes there are absolutely no chances of an area being cleansed of evil, with out contaminating other areas.

Credit: Warhammer 40k