Crystal Thorns

Thorns erupt from the users palms, soles of their feet and wrists that spiral out in seemingly random patterns that cause the ground/walls to be difficult terrain. It can make terrain impassable if the thorns are concentrated to any 5ft section, the thorns regenerate if destroyed within the users next turn and deal an extra 1d8 radiant damage to undead.    

Dispel magic or a similar effect on the user of the Crystal Thorns spell successfully ends this spell's effect.