Wither and Bloom (Yalte Resa)

A sphere with a 10-foot radius and the center set on a nearby spot receives an invocation for both death and life. Each creature of your choosing there must pass a Constitution saving throw; failing will result in 2d6 necrotic damage; succeeding will result in half damage. In that location, nonmagical vegetation withers.

In addition, in that area, one creature of your selection can spend and roll one of its unused Hit Dice to recover a number of hit points equal to the roll plus your spellcasting ability modifier.