End of Ages

Temporal ruin erupts in a 60-ft. radius centered on a point within range. Creatures of your choice in the area must make a CON save, taking 88 (16d10) necrotic damage on a failed save, or half as much on a success. On a failed save, a creature cannot regain hit points, has speed halved, and has disadvantage on attack rolls until the end of its next turn.