The name of the dota2 black bird is the Deathworld God Eater. The abbreviation of Blackbird comes from the DOTA1 era. In Dota1, it was called the Obsidian Destroyer. Its model comes from Blizzard's War3, Obsidian Statue. DOTA2 calls its Outworld God Eater. This is because the former inherited the name of the Destroyer from Warcraft III, while the latter was chosen from Greek mythology, with different meanings, different story backgrounds and origins.