Smoldering Murloc Egg

Deathy is a companion that was given out to attendees of BlizzCon 2010, purchasers of the DirecTV pay-per-view of the event, and purchasers of the internet streamed video of the event. Deathy is a murloc companion decked out as Deathwing, doing his best to strike fear into the hearts of Azeroth's crustacean population.

Deathy is delivered by in-game mail to every character on a player's Battle.net account that has been attached to a Deathy code, much like collector's edition companions. On pulling this item out of your mailbox, you receive the Deathy (achievement) feat of strength. He will occasionally breathe smoke, and more rarely leap into the air, letting loose a burst of flame.

Players are mailed this pet by Master Handler Sylvester:

Deathwing's emergence transformed the whole of Azeroth; not even the ocean-dwelling murlocs were immune to his corrupt influence.