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When casting the spell, you may have it effect an area with a radius of up to 40ft. Once the spell is cast, its area cannot be modified. If the spell targets a location, it is centered on that location. If it targets an object, it moves with the object. Only one area ward may be in effect in a given area. If multiple wards overlap, the one with the lower caster level is supressed. If their caster level is equal, the one that became active later is supressed. If area ward targets an object, its effect is centered on that object and moves with it.
Material Component: The ward requires arcane reagents worth 1,000 GP plus an additional 1,000 GP for every level of the spell to be included in its area.