As an action, you cause one creature that you can touch or see within 18 meters to violently purge blood vessels through its skin. The target must make a Fortitude saving throw. A creature isn’t affected by this spell if it doesn’t have blood in its body.
On a failed save, the target takes 3d8 necrotic damage and its purged blood vessels magically erupt.
On a successful save, the target takes half as much damage and its purged blood vessels do not magically erupt.
The avascular mass erupts in a sphere centered on the target. The avascular mass is difficult terrain and lightly obscures its area.
If the avascular mass isn’t anchored between two solid masses (such as walls or trees) or layered across a floor, wall, or ceiling, it collapses on itself, and the spell ends at the start of your next turn. The mass layered over a flat surface has a depth of 1.5 meters.
Each creature that starts its turn in the avascular mass or that enters it during its turn must make a Reflex saving throw.
On a failed save, a creature is restrained as long as it remains in the avascular mass or until it breaks free.
A creature restrained by the avascular mass can use its action to make an Acrobatics or Brawn check (its choice) against your spell save DC. If it succeeds, it is no longer restrained.
Any 1.5-meter cube of avascular mass that takes more than 10 radiant damage on a single turn disintegrates. When the spell ends, the blood vessel mass becomes a small layer of limp, decaying tissue.
You can increase the damage by 3d8 for each additional mana or psi expended.