Gong-Lu, Strength of Xuen is one of Wrathion's legendary cloak quest rewards for completing in  A Pandaren Legend Patch 5.4. It is the upgraded version of , created by using the [Tigerclaw Cape ] . Using the timeless essence will automatically upgrade the cloak to item level 136.
[Timeless Essence of the Black Dragonflight ]
Gong-Lu (刚禄, Gāng Lù) is Chinese for "strong blessing."
Hotfix (2014-11-15): Resolved an issue causing the Mists of Pandaria Legendary Cloaks and Metagems to remain effective for level 100 characters.
Can now be Patch 5.4.8 (2014-05-20): upgraded twice more up to item level 616.
Hotfix (2013-09-13): Effects for Legendary cloaks no longer activate while fighting against other players. Added. Patch 5.4.0 (2013-09-10):
Removed from game
Permanent weapons Encounter-limited weapons Items Quest items