Mantle of Twilight

This spell summons into existence a wispy cloak of shadowstuff that hangs from the shoulders of the caster. The mantle of twilight appears to twist and roil, becoming agitated if the caster is in combat. The concealing effect of the mantle of twilight makes the caster more difficult to hit, affording a -2 bonus to the caster's Armor Class. This bonus is cumulative with other magical obscurements, such as the blur spell. While the spell lasts, the caster may strike creatures that are insubstantial or ethereal — for example, a ghost or a wizard under the effects of a wraithform spell — as if they were normal flesh and blood.

Alternatively, the caster can pull the mantle close, becoming an insubstantial shadow and making it impossible to hit the caster with anything less than a +2 weapon. However, if the caster employs this option, the ability to attack insubstantial creatures is lost.

If the caster battles another wizard protected by the same spell, the two mantles are dispelled upon the first successful attack. The shadows scatter, and each wizard suffers a minor enervation effect, temporarily losing a level (which returns after an hour's rest).