Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

As the topic says. How would the necrons mind in the machine ability interact with the deathstrike missiles special rule? Could I fire it? Would I have to roll for the hour is nigh? Can I not fire the missile at all?

You can roll for The Hour Is Nigh if it's in the Shooting Phase.

If you can (not sure when the Mind in the Machine ability is used) then you could fire it, respecting the restrictions listed in The Hour is Nigh rule.

After a quick glance over the two Rules in question, I can not immediately find a reason to deny it working on a Deathstrike Missile.
The Mind in the Machine ability triggers at the start of the Necron's shooting phase while the The Hour is Nigh simple states 'the shooting phase, if you wish to fire....' Given that the Necron player is choosing to fire the weapon in a shooting phase, I can not see anything preventing them from firing the Missile. However, as the The Hour is Nigh Rule triggers when the weapon is nominated to fire, it would also require said Necron Player to complete the The Hour Is Nigh test successfully before it is actually fired.

Related question. If I remember correctly crew stunned resaults in a negative to the hour is nigh roll "not an IG player so could be wrong about that" would mind in the machine negate that debuff for the hour is nigh roll?

The roll is only affected by weapon destroyed results, so no.

And it has a special rule that says how Stunned/Shaken affect it, which should work regardless of which player controls it.

Mind in tha machine ignores shaken stunned. Would it still ignore the special rule? Or just the conventional resaults of shaken stunned is what I'm asking

Deathstrike missiles have their own rule that says how Shaken/Stunned affect them: they never prevent the missile from firing (see page 53 of the codex).