Zerg Sentries are organisms similiar to Overmind itself in its design. However, their actual main purpose is to stationary detecting all that is incoming onto the Rubybrood territory.

Blood Wurms are bone-like armored variants for Nydus Worms and Primal Wurms alike. Although it cannot spawn any minions, its powerful armor and its horns enables it to serve as a powerful bio-organic ram that breaks many various enemy defenses it encounters.

(Zerg belongs to Blizzard)