Myriad Systems in the Primordial World

How did I end up in the Primordial World out of nowhere? What am I supposed to do?

Ding! The Myriad Worlds System is online! I can get a System for every realm I reach? Then all I can say is that the protagonists of the Myriad Worlds are all trash!

Hongjun: "Good heavens, the Child of the Great Dao is terrifying!"

The Three Pure Ones: "One of my disciples is worth an entire race!"

The many Systems: "Holy crap! This Host is such a scheming little brat!"

Chen Tian: "Want to transmigrate across the Myriad Worlds? Want to get a System? Or maybe have a super-handsome old man and a super-beautiful old lady living in a ring? No problem! Come on, I'll take you all across the Myriad Worlds!"