Shadow oozes out of the floors, the walls, even the air, filling the area with wisps of writhing blackness. Creatures within the area become coated in these clinging shadows.

Any creature within the area affected by this mystery, or that enters the area on its turn, must make a Reflex save or become immobilized.

You open a conduit to the Plane of Shadow, drawing its elements into the world and igniting a black fire on the ground.

The ground becomes rough and hazardous, the real floor superimposed with the irregular terrain of the Plane of Shadow.