#52? Cultist
Variant Cleric
Must be Evil alignment.
Adds Bluff, Disguise, Gather Info., Hide, Intimidate, and Sense Motive to Class skills.
Loses Domains, but gains Undetectable Alignment at first level, and every 3rd level can add +10 to one Gather Information check to learn a secret (about a place, person, etc).
Can also muticlass into any other class they wish. Yep, even ignoring the normal alignment/multiclassing restrictions of Monks, Paladins, etc.