Update (10:30 PM EST): It turns out that it was never possible to get the Kor'kron Shaman's Treasure that rewards the Dark Shaman cosmetic set in Flex due to a bug. This should be fixed after the upcoming server restarts.
Warlords of Draenor Alpha - Build 18322
Heart of the Valorous Buff Going Live This Weekend
It appears the Heart of the Valorous buff has gone live on US-Oceanic realms! The buff is scheduled to be live this Saturday and next Saturday in China.