Whirling Blade

This spell creates a shimmering, translucent silver blade of force equal in dimensions and damage to a long sword. It orbits one of the caster's hands and strikes once per round as a magical weapon (+1 to attack and damage rolls).

The blade is weightless, and passes through metallic things as though they did not exist, without affecting them.

Metal armor is discounted when determining Armor Class against blade attacks; i.e. targets receive Dexterity and magical bonuses, but not metal shield and mail protection. Beings wearing leather armor have a base Armor Class of 8, studded leather also counting as AC8 against blade attacks; creatures with naturally tough hides or natural “armor plating” have their usual Armor Classes.

A whirling blade also passes through the body of its caster without harm-the caster is never imperiled by his own weapon. The blade cannot break, but is destroyed instantly by contact with a wall of force, antimagic shell, or dispel magic spell.

A whirling blade emits a continuous, high-pitched shrieking noise-vibrations of magical force that cannot be magically silenced-and therefore cannot be used with any measure of stealth. Note that the caster can hold or carry normal weapons and other inorganic objects in the hand wielding the whirling blade without hampering its functioning, unless the carried objects are so large as to obstruct the caster's view of foes, or so heavy (10 pounds or more) as to hamper or significantly slow arm movement. This magical weapon exists for the duration given or until the caster concentrates on casting another spell, whereupon it vanishes. Wielding and actively using a weapon also disrupts the spell, canceling its effects prematurely.