Creep Block

The creep block is a zerg block.

Behavior
Zerg hives, hatcheries, lairs, creep tumors, and the Overmind can convert nearby blocks into creep blocks. Creep blocks will then spread to every ground block except for bedrock. This will allow for zerg drones to place other hive structures. Overlords can generate creep.

Queens are also capable of spawning creep tumors.