Dheryth's Web of Force

A web of glowing, magical force appears around a creature you can see within range. The creature must make a Dexterity saving throw. On a failed save, the creature takes 4d10 force damage and is restrained within the web. A creature restrained in this way can make a Constitution saving throw at the end of each of its turns, ending the effect on itself with a successful save. 

While the web is restraining a creature, you can use a bonus action to constrict the energy around them. When you do so, the target takes 2d10 force damage.

The web sheds bright light in a 10-foot radius and dim light for an additional 10 feet