Avoidance Ward

Enchantment (Compulsion); Level: 4th

Components: V, M, F (M: a piece of rowan wood charcoal, F: a small silver mirror worth 50 gp)
Casting Time:10 minutes/stage (4 stages; 40 minutes)
Skill Checks: Arcane Lore DC 30, 1 success; Natural Lore DC 30, 3 successes
Range:Touch
Target:One dungeon door
Duration:8 hours
Saving Throw:Will negates (harmless, object)
Spell Resistance:Yes (harmless, object)
Backlash: The primary caster takes 2d6 damage.
Failure:The target door swings open and cannot be closed by the caster by any means short of a limited wish for 24 hours.

The caster begins by placing a mirror on one side of the door and writing occult symbols on the other side of the door that conform to one type or subtype of creature on the ranger’s favored enemy list. Upon completion of the ritual, creatures of the chosen type or subtype cannot open, touch, or even magically manipulate the door by any means (with no save or spell resistance applicable). A dungeon door can have only one avoidance ward at a time.