Lethal Pressure Crush |work| -

As an action, designate a 15-foot radius sphere within your line of sight. The air in this zone instantly pressurizes to lethal levels. All creatures within the area must make a Constitution saving throw.

The most infamous example of rapid lethal pressure crush is the . Four divers were living in a pressurized chamber system saturated to a pressure equivalent of 9 atmospheres (132 psi) to work on an oil rig manifold 100 meters below the North Sea. lethal pressure crush