 The film also introduced a pack of spined, quadrupedal beasts used as flushing dogs by the "Super Predators," Creature designer Greg Nicotero used hyenas as a basis for the creature's physique and the spines were added later by Chris Olivia.Predators made contact with early human civilizations such as the Ancient Egyptians, the Khmer Empire, and Aztecs, as well as a fictitious culture inhabiting what is now Bouvetøya.Upon arriving on Earth, the Predators were worshipped as gods by humans, and they taught many of the civilizations how to build pyramids (an explanation as to why many of these different ancient societies had distinctly similar cultures and architecture), but in return expected sacrifices of humans for use as hosts for huntable Xenomorphs (Aliens) — the ultimate prey for initiates.