This spell creates a spherical magical object on a point you choose within range, known as a blood moon. The blood moon is a magical object in the shape of a 20-foot radius sphere that has AC 20, 50 hit points and resistance to nonmagical damage. The blood moon sheds crimson light, shedding bright light in a 20-foot radius. On each of your turns after you cast this spell, you can use an action to move the beam 60 feet in any direction.   When a creature with blood enters the spell’s area for the first time on a turn or starts it turn there, its life force is drawn towards the blood moon in a red stream. The creature must make a constitution saving throw, taking 2d10 necrotic damage on a failed save, or half as much damage on a successful one.   Amplify 4: When you amplify this spell, each time a creature takes necrotic damage from the blood moon its hit point maximum is reduce. This reduction last until the creature finished a long rest, and the creature dies if this effect reduces it hit point maximum to 0.