Apocalypse Spell

The caster calls upon the darkest forces in all existence to rain destruction down upon the land. All creatures and objects in the spell’s area take 10d6 points of fire, acid, or poison damage (caster’s choice), and 10d6 points of necrotic damage. This damage typically levels forests, sends mountains tumbling, and wipes out entire populations of living creatures. The caster takes half of this damage. 

Upon casting this spell, the caster gains 1d3 levels of exhaustion, and can only regain them by taking a long rest.

In addition, crimson clouds quickly gather overhead and unleash a horrible rainstorm of blood that covers the area. The blood pours down in thick drops, coating everything in a dark red, sticky mess. Any living, non-evil creature in the area of a rain of blood must succeed at a Constitution save or take a –1 penalty on attack and damage rolls, checks, and saves for 24 hours. Undead and any evil creatures the caster controls gain a +1 bonus on attack and damage rolls, checks, and saves for 24 hours if they are in the area of the rain, or if they are summoned in the area of the rain.