This spell prevents undead creatures from moving into its area of effect. Upon casting this spell the affected area radiates a faint blue, flickering radiance, visible to all.
Undead must successfully save vs. breath weapon in order to enter the warded area; those failing the saving throw cannot enter. Those who can enter the area do so without penalty. An undead creature can attempt to enter the warded area once per turn, gaining a new saving throw with each attempt.
Undead already in the area of effect must make a successful saving throw vs. breath weapon or be slowed (as the 3rd-level wizard spell) for the duration of the spell.
The ward against undead is stationary and has no additional effect on combat or turning. Once a particular undead creature makes a successful saving throw against the ward it does not need to make that saving throw again. Multiple wards can be cast in the same area, requiring multiple saving throws to cross or avoid their effects, though no undead will suffer more than one slow spell at any time. A dispel magic spell will destroy the ward, but otherwise the spell will run to the end of its duration.
Notes: Rare spell from the Forgotten Realms setting. Known to be in the tome, Against the Undead.