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A malevolent darkness surrounds the subjects, protecting them from attacks, granting them resistance to spells cast by good creatures, and weakening good creatures when they strike the subjects. This abjuration has four effects:
First, the warded creatures gain a +4 deflection bonus to AC and a +4 resistance bonus to saves. Unlike the effect of protection from good, this benefit applies against all attacks, not just against attacks by good creatures.
Second, the warded creatures gain SR 25 against good spells and spells cast by good creatures.
Third, the abjuration blocks possession and mental influence, just as protection from good does.
Finally, if a good creature succeeds at a melee attack against a warded creature, the offending attacker takes 1d6 points of temporary Strength damage (Fortitude save negates).
A tiny reliquary containing some sacred relic, such as a piece of parchment from an unholy text. The reliquary costs at least 500 gp.