You create a spherical vacuum at a point you can see in which all air and gas is banished. Each creature within a 50-foot sphere must make a DC 18 Constitution Saving Throw at the beginning of their turn, creatures who enter or begin their turn inside the sphere must also make a saving throw until the spell effect ends or they exit the spell's radius. A creature takes 8d8 force damage on a failed save, or half as much damage on a successful one. Once the spell ends, all creatures within the sphere immediately take 4d8 force damage as the surrounding air pressure equalizes.
Any creature that doesn't need to breathe is immune to the spell's initial and ongoing damage, and do not make a Saving Throw. These creatures still take damage if they are within the spell's radius when it ends.
Creatures within the sphere cannot cast spells which include a verbal component. All fire, whether mundane or magical, fails to form within the sphere. All projectiles which pass through the sphere gain additional range equal to the amount of distance that they passed through the sphere. Mundane flight is impossible within the sphere. All creatures within the sphere are deafened until they have left the spell radius or until the spell ends.
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