Format:
cast 'stone skin'                       cost: 50 mana

   Stone skin is a high level mage protective spell that can be cast on others.
It will (in most cases) cut damage done by physical attacks, but it provides
little or no protection from magic and certain types of magical weapons.

Due to its high cost and short duration, this spell is used primarily cast
on the warriors and fighters of large groups, just before battle.