The Archive of Esoteric Secrets

Dissolving Downpour

7-level Evocation

You conjure a green cloud filled with acid high in the sky. The cloud fills a cylinder that is 10 feet tall with a 60-foot radius, centred on a point you can see within range, and at least 100 feet above you. The spell fails if you can't see a point in the air where the storm cloud could appear (for example, if you are in a room that cannot accommodate the cloud).   Any creature that enters a space occupied by the cloud, or starts their turn there must succeed on a Constitution saving throw or take 10d12 acid damage.   At the end of your turn when you first cast the spell, acid begins to rain down from the cloud, filling a 60-foot radius cylinder that reaches the ground below the cloud until the spell ends. Any creature that enters the cylinder for the first time, or starts their turn there, must succeed on a Constitution saving throw. A creature that fails takes 6d12 acid damage and - if they wear non magical armour, or have natural armour - have their armour partially dissolved, taking a permanent, and cumulative -1 penalty to the AC it offers. The armour is destroyed if the penalty reduces its AC to 10. A successful save halves any damage the creature would take.   The acid from this spell is very potent, and will likely kill off a lot of wildlife. Should you concentrate on this spell for the full hour, all plants within the radius will have died, and no significant amount of vegetation can grow there again for a number of months equal to your 7 + your spellcasting ability modifier.