User blog comment:WindOfTheUnwrittenLaw/Emperor's Choices: What was he thinking? (Question 1) Angron's "Butcher's Nails"/@comment-172.0.160.80-20140926083835

He could have done what Malcador did to Titan. And hide the entire planet the new Primarch was growing on. And he knew of pariahs and their anti psyker abilities.

Basically. HE had more than enough ways to keep his children safe and sound. But refused to look into them because he was too proud of his "powerful" wards.

The surgery could have been undertaken just before Angron got the insane idea to give all of his battle brothers Nails. Or at some point when they have found a safe way to deactivate or rewrite them. The way I hear it is. They checked him once. Then never touch on the subject again. No second opinions. No massive search for the creators of the Nails. Or files on how butcher nails are made. Just one night or so of a check up. And they let him lead his legion into oblivion because of moral. When I would've just had the doomed legion marge with another, and keep Angron's body in a coma so I could figure out how to cure him between theaters of war. Then and only then would I allow a clearly unstable super being command an entire legion trained and armed for galactic conquest.