The breed could direct its own evolution.
In StarCraft II, a zerg unit that kills 20 or more enemies is referred to as a metamorph. A powerful queen residing in the massive nydus network beneath the surface of Char was labeled a metamorph in the game.
- Maxwell McGee. 2011-05-31. Starcraft II: Heart of the Swarm Hands-On Preview - Zerg Campaign. Gamespot. Accessed 2011-06-02.
- Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard) (in English). July 27, 2010
- Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Belly of the Beast (in English). 2010-07-27.