Paralyzing Field - Witch

If this spell is cast on a solid surface, it creates a paralyzing field 10 feet high and 20 feet in diameter. This field lasts 12 rounds, inflicting a paralysis lasting 2d4 turns, subject to a saving throw vs. paralysis at a -4 penalty. The field is essentially invisible to normal vision, though with concentration a slight shimmer can be seen.

The material component is a powdery clay that has been soaked in giant wasp venom.