Arcanist's Manasaber

Upon her return to The Nighthold, First Arcanist Thalyssra saw to it that adventurers who helped her liberate Suramar were rewarded with prized mounts from the royal stable.
Summoning this mount in Suramar City will also apply Masquerade.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Notes:

This sleek manasaber is a reward for completing the quest Fate of the Nightborne in Suramar. To achieve this :

Complete the Nightborne storylines in Suramar up to the end of the Insurrection achievement.
After completing the above, pick up the extra quest, The Nighthold: Lord of the Shadow Council from Khadgar
After deating Gul'dan in The Nighthold and completing the above quest pick up Fate of the Nightborne from Khadgar in the same room as Gul'dan

Introduced in:

Patch 7.1.5

Travel Mode:

Ground (+60% or +100% speed)
Flying (+150%, +280% or +310% speed)

Speed depends on your riding skill.

More info on Wowhead:

Arcanist's Manasaber taught by Arcanist's Manasaber