Grimlore's Grimoire
7-level Conjuration
You create gloomy storm clouds 50 feet above the ground,
creating a mixture of dense fog and pouring acidic rain in a
15-foot-radius, 50-foot-high cylinder centered on a point
within range. Until the spell ends, dim light fills the
cylinder. Its area is heavily obscured and acts as difficult
terrain. A creature that ends its turn in the cylinder must
make a Constitution saving throw. A creature takes 8d10 acid
damage on a failed save, or half on a success.
Additionally, each time a creature takes damage from the
acid rain, metal items held or worn are exposed to the rain
and might be destroyed. For metal weapons, armor, and
objects, roll a d8. Non-magical metal weapons,
armor, and objects are destroyed on a 3 or lower.
Uncommon items are destroyed on a 2 or lower.
Rare items are destroyed on a 1 or lower. Very Rare and
Legendary items are unaffected.
At higher levels: If you cast this spell using a spell slot of
8th level or higher, the Duration is 8 hours. If you use a 9th
level spell slot, the spell lasts until you dismiss it as a
bonus action.