 Under the command of Aldaris, Fenix helps defend Aiur from the Zerg invasion, but eventually falls in the battle of Antioch when his position is overwhelmed by Zerg and his psi-blades lose power.Nevertheless, Fenix is retrieved and integrated into a dragoon, a mechanical fire support unit designed to allow incapacitated warriors to continue military service.Fenix allies his templar forces with Tassadar's upon the schism between Tassadar and the Protoss government, later leading a task force against the Overmind's outer defenses, facilitating Zeratul's assassination of a number of cerebrates and ultimately the death of the Overmind itself.