With an unreasonable Primarch like the Wolf King on the field, the Alpha Assassins were deployed aboard the Iron Fist.
Then...
The Wolf King was poisoned.
Leman Russ possessed an exceptional sense of smell and perception even among the Primarchs, which had led him to develop the habit of not wearing a helmet.
He also liked using every means available to kill his enemies as quickly, brutally, and precisely as possible, including biting.
He smelled the infiltrating Alpha Assassins, but he alone could root out these enemies.
The Wolf Brothers relied on spending long periods together to learn their comrades' scents. Once a comrade was replaced and his scent changed, they would grow suspicious.
But the warriors around them came from different Chapters and had never fought together before, making it difficult for the Wolf Brothers to conduct their "anti-Alpha Legion" operations.
Leman Russ and certain Rune Priests relied on a more "Warp-based" sense of smell. With the Rune Priests wounded, the Wolf King began hunting the agents himself.
The agents gathered in groups. What would the Wolf King do when he found several enemies standing together?
He would seek to kill several enemies in an instant, using his Chainsword, fists, legs, Ice-Rune Armour... and his teeth.
Who would he bite? Whoever had no helmet came first.
He bit their heads.
The traitors of the Twentieth Legion had concealed poison potent enough to fell a Primarch inside their heads. They peeled away their scalps, inscribed wicked Chaos runes beneath them to seal the poison, then pulled their faces back into place.
The Wolf King took one bite and immediately began foaming at the mouth.
The Khan was still in the emergency treatment room, and no one knew what to do.
The Adamantium Warriors of the Crimson Tide had remarkably similar