Similar in appearance to the nether dragon, they are attracted to and feed off of arcane energies, and so have been seen in Quel'thalas and most likely other worlds throughout the Great Dark Beyond. They are generally considered more of a nuisance than a real threat, but in large numbers they can be very deadly to magical creatures and magic-users.
According to , the mana wyrms on Sunstrider Isle were guardians of the Burning Crystals, that have long been used to power the isle's experimentations, but the Scourge invasion of Quel'Thalas has driven them errant from the blood elves lack of magical control over them.
The Consortium has managed to acquire young Mana Wyrmlings for sale as vanity pets to adventurers, albeit for a hefty fee. Dealer Rashaad is the only known seller of these, and he can be found within the Netherstorm.
The Dalaran Factions participating in the Argent Tournament, the Sunreavers and the Silver Covenant both offer a similar creature called a . These pets resemble the mana wyrms found in Elven Lands like Quel'thalas. They may be purchased with the Champion's Seal offered for participating in the tournament.