Guildwars@wikia logo See The Mists in the original Guild Wars.

Before there were humans or dwarves, before there were even worlds or the stars that light the night sky, there was but one thing in the universe-- the Mists. The mists touch all things. They are what binds the universe together, past present and future. They are the source of all good and evil, and all matter and knowledge. It is said that all forms of life, no matter how simple or complex, can trace their origins back to this one place.

The Mists contain and connect the mortal worlds and The Rift, the worlds of the immortal gods and spirits.

The Mists are where the PvP battles will be placed in Guild Wars 2.