Necrotic Sphere 2014

You send a pulse of necromantic power radiating outward in a 60-foot radius from a point you can see within range. The pulse rips the life force out of up to eight creatures, starting from the center of the area and moving outward (prioritizing targets with fewer hit points). Each affected creature must make a Constitution saving throw, taking 8d8 necrotic damage on a failure or half as much on a success.

When you cast this spell using a spell slot of 7th level or higher, the number of creatures affected increases by four for each slot level above 6th.