Wall Of Thorns

 Syntax: c 'wall of thorns' <dir>

 With a magical spell, a wall of thorns will grow temporarily to block
 an exit so that it is impossible to pass unless ethereal.

 Warning: Do not camp with this spell in Lord Areas. You can create a
 temporary haven, but if you are able to regen/respell indefinitely,
 it is a foregone conclusion that this spell will turn into Legend+.