SRD:Amulet of Proof against Detection and Location
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Amulet of Proof against Detection and Location: This silver amulet protects the wearer from scrying and magical location just as a nondetection spell does. If a divination spell is attempted against the wearer, the caster of the divination must succeed on a caster level check (1d20 + caster level) against a DC of 19 (as if the caster had cast nondetection on herself ).