Grandmaster's Deep Board

Coming in The War Within (patch unknown).

Riding Requirements:

Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Source:

The Trading Post (seasonal)
Cost: 700

Notes:

This magical flying chessboard will be obtainable from the Trading Post in an upcoming month. Unfortunately we can't say exactly when, as Blizzard don't announce Trading Post offerings ahead of time.

Travel Mode:

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

Speed depends on your riding skill.

Other Mounts Using the Same Model:

Grandmaster's Prophetic Board

Grandmaster's Royal Board

Grandmaster's Smokey Board

Blizzard ID:

2576

More info on Wowhead:

Grandmaster's Deep Board taught by Grandmaster's Deep Board