Guards and Wards Spell
D&D Guards and Wards Spell Description: This powerful spell is primarily used to defend your stronghold. The ward protects 200 square feet per caster level. The warded area can be as much as 20 feet high, and shaped as you desire. You can ward several stories of a stronghold by dividing the area among them; you must be somewhere within the area to be warded to cast the spell. The spell creates the following magical effects within the warded area.
More: D&D Spells for Guards and Wards