Shield USE:
A shield is basically a barrier between its wielder and his or her opponent.
It is used to catch blows or missiles.
It can also be used offensively to strike or push an opponent. <Shield Bash, Shield Rush>
The shield can be used fully only to the left or front of the right handed individual.
Attacks from the right flank or rear negate the benefits of a shield.

Magic Shields:
Magic shields are no less weighty than their non-magical counterparts, but they are non-bulky with respect to encumbrance.