MU Origin Updated with 'Massive' Patch

Webzen has sent word that the MU Origin has been updated with a huge patch that brings a host of new content into the game including the Server Arena, the Guardian Soul System, Muren's Book and Endless Tower. 

Update 1.6 will introduce all server PVP system, Server Arena for the first time in MU Origin the ability to engage in PVP across servers. To establish dominance throughout the lands of MU, players can now battle warriors of other servers in real time with Server Arena and fight for their honor, blood.

You can read more on the MU Origin site.