The World of Warcraft v5.0.4 patch that brings most of the new features and systems online from the upcoming Mists of Pandaria expansion is now live. The update includes new class changes, a redesigned talent system, glyphs, account-wide mounts and achievements and much more.

Area of Effect (AOE) Looting – Looting has never been easier

Theramore’s Fall Scenario – The first two Scenarios (one for Horde and one for Alliance) will be available for players to take on shortly before launch

Cross-Realm Zones – Cross-realm zones are a new technology enabling players to meet up and group with other players in underpopulated areas of the game world

BattleTag Support –Your BattleTag is a permanent, non-unique, account-wide nickname that serves as your identity when staying connected to other players using Battle.net’s powerful social features

Check out the full patch notes on the World of Warcraft site.

Ed note: Title altered slightly to reflect "massive changes" versus the idea that "massive" means literal patch size.