Witness the ringing of the Divine Bell:
Defeat Blademaster Ishi.
Defeat Anduin Wrynn.
Part of this quest happens in Kun-Lai Summit.
Upon completion of this quest you will gain 3 150 experience, 500 reputation with Horde and will receive Grand Wyvern mount.
Here you can buy Breath of Darkest Shadow Boost for EU or US Servers.
You'll get guide for completing Breath of Darkest Shadow Boost