Sauroks

Sauroks are creatures that look like a cross between arachnids and lizards. They have jointed limbs and thick, tough skin, and are relatively squat. Sauroks are the single greatest threat to civilization due to the fact that they appear to be immortal and grow larger as they age. An interesting fact about sauroks is that there are three sexes: males, females, and komales. The males copulate with the females, then once the eggs are fertilized they are transferred to the komales. The fetuses develop in the komales, and are born after 1.5 years. Sauroks are usually born in groups of  4-8. Komales only have the ability the carry young from the age of 500-1750. Smaller sauroks can be killed using regular weapons like arrows and swords, but once they reach a certain size their skin becomes too thick and tough to penetrate.

Age and Size Relationship
It is not known how large sauroks can grow, but the fact that the world still exists suggests that there is an upper limit, or that the world is still quite young.

Optrus Maaj
Optrus Maaj is the common name given to what is believed to be the largest saurok ever. Supposedly it was almost 30 meters tall and 105 meters long. Based on those dimensions, it is estimated to have been over 68,000 years old. It appeared seemingly from nowhere, leading many to believe that it was sleeping in a hidden place for an extremely long time. It began to rampage, destroying entire nations. It was thought that the end of the world had come. But salvation came in the form of a man named Tenorin. Tenorin used his Draggor's Fire to burn through Optrus Maaj's skin and melt it's insides. The death of Optrus Maaj heralded the start of the current age. Scholars often speculate why no sauroks any where near the size of Optrus Maaj have been seen. If the estimated age of Optrus Maaj is correct, then it stands to reason that there should be others of similar sizes. Perhaps Optrus Maaj killed them long ago? Or maybe they are sleeping in hidden places, waiting for their chance to break the world.