Gunship Battle 3D (T8 Berkut) ep23 mission 6: time to decide

Clearing mission 6 of episode 23 with T8 Berkut. Destroy black sun and prevent them from escape. At the end, the Archae ship is invincible, move your attention to the the black sun and the shadow, When time is almost up(at 1 minute remaining), the energy core will appear in blue mark on the map opposite side. Go get it and turn back. See recorded video.