Wall of Thorns (Arcana)
Level: Druid 5, Plant 5, Bard 5
Mana: 10. Base Success: 90%.
  Conjures a solid barrier composed of thick shrubbery interwoven with razor-sharp, thorny vines. The wall of thorns fills an area with diameter 30 feet (3 squares). Any creature attempting to move through it must make an Escape Artist check (DC 30). If successful it moves at 15% normal speed and takes 25 points of slashing damage.