The red wake of 9-reppoc

While fighting Daemons and heretics, Tyberos is sent to an unknown desolate world by a heretic psyker. When he awakens, he comes across remains of what looks like a city form before the Imperium was founded, maybe before even the golden age of technology, but what he did not expect was to find sentient little robots, most about a quarter of his height, hiding behind a bunker door, all the while other little robots that glow yellow are trying to kill them.

I don't own anything, murder drones belongs to GLITCH (P.s you should watch it), Warhammer belongs to whoever it does, the only thing I own is this story idea.