You invoke both dead and life upon a 10-foot-radius sphere centered on a point within range. Each creature of your choice in that area must make a Constitution saving throw, taking 2D6 necrotic damage on a failed save, or half as much on a successful one. Nonmagical vegetation n that area withers.
In addition, one creature of your choice in that area can spend and roll one of its Hit Dice and regain a number of Hit points equal to the roll plus your spellcasting ability modifier.