Brakk

The creature named Brakk is a primal Zerg that originates from the Zerg homeworld of Zerus. Apparently sentient and capable of speech, Brakk was a powerful Zerg organism that lead a pack on Zerus. He came in contact with Sarah Kerrigan and opposed her awakening the Ancient One; he and his pack fought against her own swarm but were killed in the following battle.