Air Pressurization

A 10 foot sphere of air rapidly decreases pressure, but is only confined to that place.

Any creature that ends its turn inside of the sphere makes a DC 15 CON Saving Throw. On a failed throw, the creature takes 7 (2d6) force damage and falls unconscious until they are out of the bubble. Once out of the sphere, they must make a DC 10 CON check to wake up. On a saved throw, the creature takes half damage and does not fall unconscious.