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Or just scoop their brain out and put a squig one in

 Phiasco II wrote:
Nah, if their link to the hive mind ever failed they would just revert to instinct.

Yes which would be to eat, if a Hive Fleet lost the connection everything on that Hive Fleet would want to eat each other.

 Zande4 wrote:
Or just scoop their brain out and put a squig one in

Squigs were Tyranid Organisms if I recall correctly back in 2nd edition.

 Pilau Rice wrote:

 Phiasco II wrote:
Nah, if their link to the hive mind ever failed they would just revert to instinct.

Yes which would be to eat, if a Hive Fleet lost the connection everything on that Hive Fleet would want to eat each other.

 Zande4 wrote:
Or just scoop their brain out and put a squig one in

Squigs were Tyranid Organisms if I recall correctly back in 2nd edition.

Yeh I think it's been mentioned more recently too.

Neutralista wrote:

 Zande4 wrote:
Tyranids going rogue from the hive mind is the equivalent of your hand going rogue from your brain and proceeding to slap you. Tyranids are the organs, muscles, vessels, limbs and so on of the hive mind. Lost tyranids that rejoin fleets are like getting limbs reattached. Sorry for all the analogies lol.

Aaaactually, there are people who have had that happen to them. They had a section of their brain severed and it lead to a second personality in their heads that caused one of their hands to try and kill themselves. A number of people have had that happen. The people have no control over that hand and the hand will try to kill themselves, people that try to study them, and so on. If I remember right, there were something like 30 cases of this happening.

Just saying.

Even then, without signals to that hand, the hand doesn't do anything. The Hive Mind is the brain, doesn't matter if it sends funky signals to the hand, without connection, it's got no direction

I think the farthest with the OP's idea is rogue genestealers. I mean, most genestealers have a strong sense of self preservation, this way the 'nid fleet finds more planets when the genestealers sets up shop again.

But other than that, I'm with the majority, it can't really be done