Chauntea's Cycle

Invoking both death and life upon a 10-foot-radius sphere centered on a point within range. Every creature you choose in that area must make a Constitution saving throw, taking 2d6 necrotic damage on failed ones, halving as much damage on a successful one. 

You can also choose a creature in that area can spend and roll one of its unused Hit Dice to regain a number of hit points equal to the roll plus your spellcasting modifier.

The spell is a blessing from Chauntea, representing life and death.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot above 2nd, and the number of Hit Dice that can be spent and added to the healing roll increases by one for each slot above 2nd.