Murkimus the Gladiator
Binds when picked up
Use: Teaches you how to summon this companion.
This pet was awarded to players who competed in at least 50 games (3v3 matches) during the Qualification Round of the Arena Tournament (also known as the World of Warcraft Arena Pass).
Murkimus was mailed to all current characters on the qualifying player's account. 200 games were required in 2009.
The first tournament was held in 2009 and the last tournament was in 2013. There has not been an event since then. Blizzard has not made an official announcement regarding the future of the Arena Tournament, so it is unknown if and when this pet will be available again.
We've heard additional reports that an identical Murkimus the Gladiator was given out to the first wave of players who logged on in China after the new Chinese operator, NetEase, took over and reopened the WoW servers.