Crystal of Spellwarding (3.5e Equipment)

Crystal of Spellwarding
Summary::For those who fight mages and other spellcasters, this crystal can be an invaluable addition.

If you are targeted by a hostile spell, spell-like, or supernatural ability, you may delay the onset of its effects for one round. This must be decided before making a saving throw if one is allowed.
 * Least

As per the least version, and if the armor this crystal is equipped to has armor spikes you may make an attack with them as an immediate action when targeted by a hostile spell or supernatural ability to bat the spell away. The effective AC that the attack needs to meet or beat is equal to 10 + the caster level of the spell + the caster's primary spellcasting ability modifier + 1/2 the spell's level, rounded up. Should you succeed, you suffer no effects from the spell whatsoever.
 * Lesser

This version works as per the lesser crystal, but you may choose instead to reflect the spell upon its originator rather than simply negating it when you beat the above AC as per spell turning.
 * Greater

Aura: Faint (DC 17) evocation Price: Cost::3,000 gp (Least), Cost::12,000 gp (Lesser), Cost::30,000 gp (Greater)