Random Magic Armor (any level)

Shield, large, steel
(Self-revealing) valued at 50,170 gp.
Reflecting Ability

This shield seems like a mirror. Its surface is completely reflective. Once per day as a free action, it can be called on to reflect a spell back at its caster exactly like the spell turning spell.
Aura: Strong abjuration
Caster Level: 14th
Requirements: Craft Magic Arms and Armor, Spell Turning
Price: +5 bonus
Source: Dungeon Master's Guide v.3.5

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