Effect: Change the ground within Area: Circle with a Radius determined by the effectiveness score centered on a point within Range: 60m into sludge. The ground must be dirt, not a floor or rocks.

Any character who moves within the sludge area must make a spell resistance check for each 5m they move. If they pass the check, they are entirely unaffected. If they fail, they fall prone on the spot.

This effect lasts for a duration determined by the effectiveness score. Once it ends, the sludge will slowly revert to normal.