Dark Star

Dark Star is an 8th-level dunamancy spell created by Matthew Mercer for the Explorer's Guide to Wildemount.

Description
Cast on a point within 150 feet, the spell creates a sphere with a radius of up to 40 feet filled with magical darkness and crushing gravitational force. For the duration, the spell's area is difficult terrain which neither darkvision nor non-magical light illuminates, and no sound can be created within or pass through the area. A creature or object entirely inside the sphere is immune to thunder damage and deafened. It is impossible to cast a spell with a verbal component.

Any creature that enters the spell's area for the first time on a turn or starts its turn takes 8d10 force damage on a failed Constitution saving throw, and half as much damage on a successful one. A creature reduced to 0 hit points by this damage is disintegrated.