The "Hand of Glory" is usually the left hand of an executed man coated in fat of said same person, so that it can be lit like a candle. When lit, it seems to stop those in "front" of the hand "in their tracks".
A pawn shop or antique store with cursed objects was the premise for the Canadian-based drama, television serial Friday the 13th: The Series (1987) (not related to the Jason Voorhees franchise Friday the 13th (1980) ).
The trivia items below may give away important plot points.
When John is sent back to 2003 at the end of the episode, he wakes up in the Impala. The car is shown to have its original "KAZ 2Y5" liscense plate, as well as dual spotlights located on either side of the windshield, which were on the car for the first 2 seasons of the show.
Zachariah calls Castiel "Constantine (2014)", of course Castiel doesn't get the reference. Castiel was actually modeled after John Constantine from the DC Comics w/trench coat , tie and white Oxford shirt.