Choose a point on a surface you can see within range. An acidic bog begins appear in a 10 radius across its surface, and magically extends 5 feet deep, replacing what surface was there for the duration. This area is considered difficult terrain.
At the start of subsequent turns while still concentrating on this spell, you can use your bonus action to cause this Caustic Mire to spread. When you do so the radius the Mire covers increases by 5 feet, up to a maximum of a 30 foot radius.
Any creature that starts its turn in the Mire, or moves into it for the first time on its turn must make a Constitution saving throw. On a failure, they take 6d8 acid damage, or half as much on a success.
At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the damage is increased by 1d8, and the maximum radius it can grow to increases by 5 feet for each slot level above 6th.
* - (a handful of mud and a drop of acid)
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