Death Burst

You are able to conjure a volatile orb of necrotic magic. Each creature in a 30 foot radius sphere centered on a spot within range must succeed on a Constitution saving throw.

On a failed save, a creature takes 10d6 necrotic damage and its hit point maximum is reduced by the amount of necrotic damage taken for 1 hour. Remove Curse or Greater Restoration allows a creatures hit point maximum to return to normal before that time has passed.

On a successful save, creatures take half damage and are otherwise unaffected.

If this spell reduces a creature to 0 hit points, it is instantly killed. This spell has no effect on constructs and undead.

At Higher Levels. When you cast this spell using a spell slot of 9th level, the damage increases by 2d6.