Black Cat Bone
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A Black Cat Bone was part of the 1930's era bluesman's arsenal of charms and curios, circumspectly kept to ward off evil, make money and hypnotically attract the fairer sex. The aforementioned items, securely kept in a mojo bag would give the bearer that extra-edge and confidence he needed to prosper and succeed in an era laden with depression and poverty.
...Got a black cat bone, got a mojo too,I got 'john the conqueror' root, I'm gonna mess with you... Hootchie Cootchie Man, Muddy Waters