TERRA SHIELD

'TERRA SHIELD'
syntax: cast 'terra shield'

A skilled battlemage can create a sentient wall of ground around him which 
can block weapon attacks in combat.  The spell can only be cast on room which 
there is earth to be moved and dispelled if caster moves.  It is rumored that
powerful and skilled enough Battlemage can breathe actual intelligence in 
ground around him, creating a powerful mobile ally for his defense.
This powerful enchantment requires significant upkeep as time passes.