They are one of three exclusive companions available in Halloween 2016 Event, along with the Ciralak and Chead. They can only be obtained during the two weeks of the event (19th October - 2nd November 2016). If purchased from the shop, they cannot be sold on the market.
They eat Terrifying Sweet's (18 Maana). Their bait is Radioactive Silk which can be purchased in the shop for (300 Maana/50 Gold). The bait can be found at the Village of the Damned or Demonic Altar locations on the Halloween Map.