Question regarding weird cybernetic bodyguards

[Dagoth Ur]

Hello everybody,

 

Lately , I've been contemplating on doing a small Iron Hands force and then I remembered something; I seem to recall that in some book set in the 40k-era, there is a unit of TDA equipped, silent bodyguards for officials of the Iron Hands chapter or perhaps just for select Iron Fathers. I also recall that apparently they had little heraldry and there was some speculation on them being reanimated via the Keys of Hel. I don't quite recall what they were called, I think the title started with Hel/Hell or something like that. Kardan Stronos himself is apparently unnerved by them.

 

Does anyone recall something like that? Do you maybe have the exact name, or maybe even the book(s) they are featured in?

[Morovir]

Helfathers. Seen in Eye of Medusa and Voice of Mars. For further information:

 

http://www.bolterandchainsword.com/topic/352375-current-iron-hands-structure/?do=findComment&comment=5216211

[Dagoth Ur]

You are a true gentleman and scholar, good sir :)