The infamous Fluorescent Green Mechanostrider has been found in Phase 2 of Season of Discovery!
Players have reported that the mount drops from Mekgineer Thermaplugg, the final boss in the new Level-Up Raid Gnomeregan. Some players saw it drop as a BoE and even tried selling it on the Auction House, but Blizzard quickly Hotfixed it and made the mount be BoP.
Have you ever heard the tragedy of the Fluorescent Green Mechanostrider?
In case you have slept since then, the Fluorescent Green Mechanostrider earned its fame after a player back in Vanilla accidentally deleted his normal Mechanostrider mount and submitted a ticket about it. The GM that responded to the ticket then mistakenly sent the player the unobtainable Fluorescent Green Mechanostrider.