Corpse Churn

You utter out an iniquitous phrase, churning the innards of those who hear it. Choose up to four humanoid creatures within range. They must succeed on a Constitution Saving Throw, or take 3d6 necrotic damage, 3d6 acid damage, and are incapacitated for the spell's duration, as the targets are painfully and uncontrollably voiding their bowels. Those who have proficiency in Constitution Saving Throws makes the save with advantage. On a successful save, the targets takes half damage, and aren't incapacitated. A target can repeat the saving throw at the end of each of their turns, ending the spell on a success. This spell has no effect on Constructs, Undead, or those who are unable to hear.

If damage from this spell drops the target(s) to zero hp, their body explodes in a shower of dark viscera, dealing 1d10 necrotic damage, and 1d10 acid damage to those within 10 feet of the target(s).

When you cast this spell using a spell slot of 8th level or higher, the damage from the inital source increases by 2d6, and the damage from the explosion increases by 1d10 for each slot above 7th.