If you are referring to the list that Debra Meister submitted for Rick Armstrong,
she referenced a 2010 chip from Agua Caliente. I imagine she was writing
about the following chip. It was one of many chips in the casino series of chips
recognizing musical acts that were performing at the casino. Not really a
Halloween chip, per se, but the band is called, "Here Come the Mummies" and
their show was the night before Halloween. Good enough for me