Crawling Towers are massive Wormwood Symbiotes. Another feature of the ability of the Host to corrupt the very ground of Wormwood, the Towers are the typical base of the Host. Most are 8-12 stories tall. The main feature is that they are mobile, moving along the ground, steered by one of the Host or a dark priest at about 10 mph. In Host controlled lands, they serve as bases for patrols, especially of Sky Riders and Demon Hounds, and as secure sites for dark priests to hold their rituals and keep their life force cauldrons. For the Host on the march, the Towers serve as logistics bases, following behind the main horde, something akin to an entire mobile city following them.