MANA SHIELD

'MANA SHIELD'
Syntax: cast 'mana shield'

This spell surrounds the caster with a shield of pure energy.  The shield 
can help deflect magical damage inflicted by the caster's opponents. However, 
the upkeep of this spell is very stressful.  The caster would have to put in 
more mental energy every time a magical attack is directed at him in order 
to deflect the damage toward him.  The efficiency of the upkeep increases 
as the caster rise in rank.