Spore crawler

Spore crawlers are a mobile zerg anti-air defensive structure. Terran research of this unit inspired the creation of Shrike turret.

Game Unit
Spore crawlers can move, but can only plant themselves on creep.

Strategies
Players will want to spread creep onto the map to create more space for their crawlers. Their mobility allows players to simply relocate the crawlers depending on the situation, and as such, they could build them in lesser numbers without weakening the defenses. Like the spine crawler, spore crawlers slowly die if rooted in ground not covered with creep. They can, however, survive indefinitely without creep so long as they are uprooted.

Development
Crawlers used to lose armor and hit points while uprooted.