Thick roots emerge from the ground in response to your command, and your foes stumble as they try to slip through them.

Daily   ✦     Primal, Zone
Minor Action      Area burst 2 within 10 squares

Effect: The burst creates a zone that lasts until the end of the encounter. The ground in the zone is difficult terrain for your enemies. When any enemy charges, its movement cannot include any square of the ground in the zone.

Published in Heroes of the Forgotten Kingdoms, page(s) 162.