Horsebane

R: 100 ft; T: area; D: [sum] Rounds

The ground in a 20 ft radius circle becomes sticky and soft. Creatures in the area move at half speed and take 1 damage per Round.

Any creature running or charging in the area when it was cast must Save vs Agility or take [sum] damage and fall immobilized for 1d6 Rounds. Creatures with more than 2 legs have a Bane to this Save.