Blood Rain

Until the spell ends, thick blood falls in a 60-foot-tall, 30-foot-radius Cylinder centered on a point you choose within range. The area is Lightly Obscured, and exposed flames in the area are doused.

Ground in the Cylinder is Difficult Terrain .When the cylinder appears, for each creature within it, you may choose to blight or bolster that creature. You may also choose to blight or bolster a creature that ends its turn within the cylinder.

Blight: If you choose to blight the creature, it must make a Constitution Saving throw or take 3d8 Necrotic damage, taking half as much on a success. A creature that fails this saving throw has disadvantage on its next attack roll.

Bolster: If you choose to bolster the creature, it gains 3d8 Temporaty Hit Points, it may use its reaction to stand up if it is prone, and that creature has advantage on its next attack roll.

If you are within 150 ft. of the cylinder you can move it up to 150 ft. as a bonus action on your turn.

Using a Higher-Level Spell Slot. The damage and temporary hit points both increase by 1d8 for each slot level above 4.