How do i get to the tombs of the primeval kings?

Can someone tell me how to get to that dessert and enter the tomb of the primeval kings??i want to win a sigil there

many thnx,

Blue Eyes Hydra

Either make PvP Character and go directly to the tombs or complete the missions up to the desert, until u fight your mirror and get to dragon's lair (where teh entrance to the tombs is)