Megalania

Megalania is a giant monitor lizard that has a septic bite like the komodo dragon of modern day. It reached lengths of 20 feet and grew to be 4 feet tall. one Megalania was found roaming the halls of the arc but it is unclear where it came from. It's unclear how or when, but Markus claims to have encountered a Megalania when he was stuck in an Anomaly.

this lizard has shards of bone in it's scales making it bullet resistant, this is proven when a police officer shot one and the bullet dropped onto the ground. This officer was killed by the animal after he shot it. You can't out run this carnivore, since it has the ability to pump more air into it's lungs by expanding it and then contracting it, putting more oxygen into the lungs.

Apparently, if humans were to go extinct or disappear in Australia, Monitor lizards could grow to the size of this mega lizard or even larger. This lizard has the power to break a hole through a meal door, since the captured Megalania was able to break out and surprise Katanna in the break room, but it was only interested in her steak. But if not fed it will attack with its metal piercing bite meaning not even the knights are safe from this creature's septic bite