Creep tumor

The creep tumor is a structure which extends the creep. It resembles an eyeball protruding from the creep.

Game Structure
Creep tumors are created by queens or by other creep tumors and must be built on creep.

The creep tumor is burrowed, rendering it stealthy. The stealth enables "offensive" creeping.

Development
In older versions of StarCraft II the creep tumor could evolve into a shrieker. Shriekers extended the range of swarm clutches to anywhere within its own detection radius, and through careful positioning could effectively double their attack range in some cases.

Creep tumors used to be produced from hatcheries within a given range of the producing building.