Spine crawler

Spine crawlers are a mobile zerg defensive structure.

Game Unit
Spine crawlers are ground defensive structures that can uproot and relocate. They can only plant themselves on the creep. They have a speed of 2.25 on the creep, and a speed of 1 off the creep due to their Creep Move ability. While moving, spine crawlers lose their armor and their hit points are reduced to 100.

Strategies
Players will want to spread creep onto the map to create more space for their crawlers, such as putting creep onto choke points. The ability to mobilize base defense will also allow for new streamlined strategies that would call for less units, as they can be redistributed across the base depending on the situation.

Trivia
The flood root of Halo Wars has a similar appearance and function.