Apocalypse from the Sky

9th-level conjuration (Sorcerer,Warlock,Wizard)

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• Casting Time: 1 hour
• Range: Self (1 mile)
• Components: V, S, M (an artifact once aligned to good that the caster has personally corrupted to evil, which the spell consumes)
• Duration: Instantaneous

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You channel the essence of entropy, through yourself, into the sky. Every creature within range must make a Dexterity saving throw. They take 10d6 acid, fire, or poison damage (caster's choice) on a failed saving throw and half as much on a successful one. 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. Other gods take notice, and often warn their followers or send servants to deal with you directly.

Channeling the essence of entropy takes a direct toll on the caster as well: when you cast this spell, you take 10d6 necrotic damage, you are necrotized for 24 hours, and must roll 1d6 and permanently decrease your Constitution by the number rolled. This damage cannot reduced or resisted in any way.