Before their Primarch returned, the Raven Guard had been renowned for their ferocity in battle. They excelled at frontal assaults, fighting almost like the Iron Warriors. But then their Primarch returned.
This Primarch had genuinely been raised by the proletariat. By the time the Emperor found him, that slave-owning planet had already been unified. Everyone could surely guess what had happened.
The Primarch immediately passed on his extensive experience in guerrilla warfare, tunnel warfare, and decapitation strikes to his Legion.
Even now, the Raven Guard remained among the best at operating behind enemy lines. (After all, no one knew whether some of the Alpha Legion's warriors were loyal.)
These five audacious warriors disguised themselves as space debris and drifted toward the main Ork force.
Ork detection largely relied on mystical intuition: I reckon there's someone over there. But much of that intuition came from warnings provided by their own waaaaaaaaagh psychic energy.
Now, an Anti-psyker Device enveloped the five warriors, preventing the waaaaaaaagh energy from reacting.
The price was steep. With no mortals aboard and the Anti-psyker Device covering only a limited area, the warriors could no longer control the Warp Engine or the ship's Void Shield.
This small vessel normally required at least thirty mortals to operate. Now it had only five Astartes.
Things could never go entirely smoothly. An outrageously bold scavenger ship from the Deathskulls Clan headed their way.
Orks were nowhere near as cautious as the Imperium or Chaos. The fiercer the battle, the happier their scavengers became.
They collected huge chunks of space debris everywhere, hauled them back to turn into waaaaaaaaaagh contraptions, and then sent them straight back onto the battlefield.
Then an Ork with spectacularly good eyesight took a fancy to this particular fragment.
A Big Boss from the Deathskulls Clan set his