Players who complete the Glory of the Dream Raider mount in Patch 10.2 will receive the Reins of the Shadow Dusk Dreamsaber mount.
Glory of the Dream Raider consists of 9 achievements (1 per boss) that you must complete in Amirdrassil.
Reins of the Shadow Dusk Dreamsaber
Guilded within the shadows of twilight, they slip through the darkness and prey upon their targets. Few have seen them, and only as they saunter back into the shadows with meal in jaw.