Blood Rain

Designate a a 15-foot radius, 60-foot high cylinder within range. A red, bloodlike fluid rains down in this cylinder. Creatures other than you which begin their turn in the target area or enter it on their turn must succeed on a Constitution save or take 4d8 necrotic damage. This spell has a reversed effect on undead, causing them to instead regain 2d8 hit points. When you finish concentrating on this spell, the rain persists for one additional round. While concentrating on this spell, you can use your action to move the pillar up to 20 feet in any direction.