Elise's Raining Blood

As part of casting this spell, you must expend five of your Hit Dice. Roll these dice; you take necrotic damage equal to the total rolled. This damage ignores resistance and immunity. If you do not have five Hit Dice to expend, the spell automatically fails. This damage is added to the needles.

Your blood flows from your body, forming a storm of crimson, needle-shaped crystals that shoot outward in a 40-foot inverted cone. Each creature in that area must make a Constitution saving throw. On a failed save, a creature takes 2d6 piercing damage, plus an additional 2d6 piercing damage for every 10 feet it is away from you.

Additionally, the needles embed themselves in the targets that fail the save. For the next minute, the next time a creature embedded with needles is hit by a melee attack, the needles shatter, dealing extra piercing damage to that target equal to twice your spellcasting ability modifier (minimum of 2), and the needles are destroyed. On a successful save, a creature takes half as much of the initial damage and no needles embed in it.