Al-Hazared's Withering Decay

You draw the life force from every creature in a 30-foot cube centered on a point you choose within range. Each living creature in that area must make a Constitution saving throw. A creature takes 15d8 necrotic damage on a failed save, or half as much damage on a successful one. You regain half the damage in hit points from each source

Nonmagical plants in the area that aren’t creatures, such as trees, grass, and shrubs, wither and die instantly.