Agony of the Fallen

Choose a target (or 1d4 targets) within the caster's line of sight.

The caster cups a piece of bone between their hands (as if praying) and crosses opposing fingers relative to how many targets they are focusing on (e.g., two "pointer" fingers stay in a "prayer" position with all other fingers crossed for one target).  The caster chants and their hands glow a mixture of bight, neon green mixed with swirls of black mist.  The caster then pushes their hands outward and releases their intent upon the desired target(s) and the piece of bone explodes into tiny particles to seek vengeance upon the chosen.

All affected targets immediately fall to the ground.  For the duration of this spell, all affected targets are incapacitated while their bodies flail around where they fell; experiencing morbid, terrifying hallucinations as well as intense pain and suffering.  All affected targets take 4d6 Necrotic damage as their life force is violently wracked by the trauma.

All potential targets that successfully made their CON Save... fall to the ground prone, and take half damage.

When this spell is cast with a 5th level spell slot or higher, the damage increases by 2d6 for each spell slot above the 4th (e.g., a 5th level slot would add 2d6, while a 6th level slot would add 4d6, etc.).