Accodring to Twohy, "On this god-forsaken world are alien artifacts, totems to an advanced society." This must be one of the "artifacts."
Twohy called this a bison-like creature, which is a source of food for Riddick as well.
This is the "fiercest" new beast on the alien planet where Riddick is stranded. He even has two heads, the top is used to lure away prey, while the bottom is full of sharp pointy fangs.
Riddick will be " Hunted by two Merc teams who arrive by air but soon take to the ground in jet cycles!" Twohy calls it, "half hover craft half stunt bike."