Creep Tumor

From The StarCraft 2 Wiki

Creep Tumors are Zerg buildings that are built by the Queen. They are permanently Burrowed once completed and gradually expand the creep. The Creep Tumor is instrumental in establishing well positioned base defense, making spine crawler rushes possible and providing the 30% movement speed bonus to zerg units over a larger area of the map.

The Creep Tumor has 100 hit points, a build time of 20 seconds, and costs the queen 25 energy to produce.

This unit is a replacement for the creep colony from the original Starcraft, and although having a similar function, is much cheaper to produce.