Baelrog Brood

The Baelrog Brood consisted of the most fearsome of all Zerg warriors. Ravenous and bloodthirsty to the extreme, the Baelrog Brood was often called upon by Cerebrate Gorn to sow terror and confusion among enemy ranks. The Brood managed to make even other Zerg uncomfortable, as it was not only known for its savage battle tactics, but also for its voracious cannibalism. The Baelrog were bred and trained to attack without hesitation, mercy or self-consideration. Baelrog typically causeds enemy warriors to flee for their lives or turn upon their own kind in order to find some desperate means of escape from the horrendous Zerg onslaught.

History
The Baelrog Brood was best noted for its prominent position as one of the broods that invaded Aiur. After the manifestation of the Overmind on Aiur, Gorn may have landed on the planet to direct its forces from within a hive cluster.

Protoss Praetor Fenix attacked his hive cluster, and was able to destroy most of the hive cluster and destroyed the Cerebrate's body. But before their very eyes, the Cerebrate was reincarnated and its brood rallied to annihilate the Protoss attackers, rebuild, and continue the campaign against the Protoss.

Much later, though, Tassadar, Fenix, and Zeratul returned to Aiur. In preparation for the final battle with the Overmind, the Protoss attacked the central Zerg hive clusters of two Zerg Broods, one of which may have been the Baelrog Brood. Both broods were destroyed completely by the valiant Protoss attackers, and the Cerebrates was killed by Zeratul, rendering the Broods harmless.

Trivia
The Baelrog Brood is named after the demonic Balrog in the Lord of the Rings trilogy by J. R. R. Tolkien.