Hellcow is one of the non-playable characters in LEGO Dimensions 2: The Rise of Enoch, from the Marvel Comics franchise.
At some point in the 1670s, the vampire known as Dracula found himself starved and flying desperately around the rural farmlands of Switzerland. All of the local homeowners had boarded up their homes for the evening, and the vampire had no means of satisfying his vampiric thirst. He came upon the fields of a farmer named Hans and attacked his prized cow, Bessie. Dracula drank his fill of the animal's blood and left it for dead. The following morning, Hans discovered Bessie's blood-drained corpse and buried the remains. He even fashioned a personalized tombstone marking the spot where Bessie had died. Three nights later however, Bessie rose from the earth as one of the undead.