Blizzard have released long awaited The Thunder King patch on World of Warcraft.

Patch 5.2: The Thunder King has gone live on World of Warcraft, which adds new world bosses, a new zone, new raid, server-wide events, new factions and more.

Lei Shen has consolidated his power on the Isle of Thunder, and if he’s not dislodged, his reborn army will threaten all of Pandaria. But the return of the Thunder King is good news for you, because it means that new challenges and triumphs await in our latest major content update. A massive new zone, a new raid, server-wide events surrounding the siege on the Isle of Thunder, new factions, world bosses . . . and more. Brace yourself for the storm.

Check out the trailer here…

Full patch notes and details can be seen here