Dwarves are also an interesting race

Dwarves are also an interesting race in that, according to the trailer, they actually had legends about Zhaitan.  Given that they also had legends about the Great Destroyer, the dwarves seem to have much more knowledge about the elder dragons than the other races.  What year were the dwarves created, and what legends did they have about Zhaitan?

As one of the elder races,  dwarves know more about the Primordus, his minion the Great Destroyer, and their dragon kindred. Only a portion of that was written down in books such as the Tome of Rubicon, but the knowledge still survives elsewhere.