While Hierarch Artanis and Commander Raynor were occupied stabilizing Sky Shield, Moebius Corps raided the Imperial Palace and stole the Keystone. They retreated to an entrenched position at Bennet Port, where they were preparing to take the artifact off world. Raynor, Artanis and Emperor Valerian Mengsk sent forces to intercept them. Raynor and Artanis arrived and set up their bases, with Valerian's forces getting delayed. Several hybrid dominators began channeling void energy into the Keystone, stunning all terran forces on the field but leaving the protoss and the hybrid unaffected. In order to combat the hybrid Artanis deployed immortals to provide heavy assault support. Valerian noted that there were research stations with personnel that were unable to evacuate. If Artanis helped them, Valerian would return any protoss technology within, including some solarite. The combined Daelaam/Dominion force broke through the Moebius Corps and hybrid position, destroying the containment unit housing the Keystone. Artanis warped the artifact aboard the Spear of Adun. Moebius Corps and the hybrid were driven off of the planet, but at great cost to the Dominion. Augustgrad was in ruins, with countless terrans dead. Valerian and Admiral Matt Horner surveyed the dead and aided wounded. Artanis and Raynor looked upon the destruction, and Raynor said that if Zeratul believed he could make a difference, then the fight had just begun. Raynor and Artanis shook hands, and Artanis was warped aboard the Spear of Adun. "Brothers in Arms" mission from 'Starcraft 2: Legacy of the Void' PC game. Gameplay on Normal. Watch more Starcraft videos:.