The Crypt (Called Chaos Barracks in The Code) functions as the main training ground for the melee forces of Chaos and funtions similarly to the Order Barracks. Here, the pack-based Crawler are trained to hone their predatory skills (Pack Mentality), Bombers are trained here and Juggerknights end up even more lethal than they were before with the Charge ability.
These are units with the same queue that comes from the Crypt.
Crawler, Juggerknight, Bomber