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I'm still getting to grips with 7th edition after an extended absence - in the Necron codex there are several formations, like the Destroyer Cult etc, which can be taken in the Decurion detachment and give their bonus. If you're taking a CAD, can you also take one of these formations, like an Annihilation Nexus as a heavy support choice, or is it just that if you take a Doomsday Ark and 2 Annihilation Barges as your 3 heavy support choices then it can count as the formation? Or can you not take a formation in a CAD at all, and only in Decurion or possibly unbound?

The CAD uses the "Battlefield Roles", so you need a Heavy Support choice to fill that slot. The formations can be taken in addition to a CAD (as formations are types of Detachments) but not in a CAD. Only specific detachments like the Decurion can have formations within.

Unbound, do as you please!

LordGrantius wrote:
The CAD uses the "Battlefield Roles", so you need a Heavy Support choice to fill that slot. The formations can be taken in addition to a CAD (as formations are types of Detachments) but not in a CAD. Only specific detachments like the Decurion can have formations within.

Unbound, do as you please!

So if a CAD was my primary detachment, I could take a single formation as a secondary detachment? For example a CAD and a Destroyer Cult?

You can take as many formations as you want with one or more CADs, as many CADs as you want or formations and no CAD.

Scarey Nerd wrote:
So if a CAD was my primary detachment, I could take a single formation as a secondary detachment? For example a CAD and a Destroyer Cult?

Correct, or reverse it. Have the Destroyer Cult Destroyer Lord be your Warlord making the Destroyer Cult your primary detachment, and the CAD be the "secondary" detachment.

Heck, if you have the models and points, your army can be made up of only Destroyer Cult Formations.

Indeed. Essentially forget sixth edition and before

To build a bound army, all units must belong to exactly one detachment (unless told otherwise - see the decurion) formations are a special type of detachment.

And that's it. Take as many Detachments as you wish.

nosferatu1001 wrote:
Indeed. Essentially forget sixth edition and before

That's the biggest thing - returning players often try to understand 7th edition army construction in the context of how it worked in previous editions. If you forget everything you knew about how army construction used to work and read the whole "Choosing Your Army" section with an open mind, everything makes sense.

Okay, I get the big picture - can you have formations in an unbound army, then? Obviously you can take the models, but do they just count as their individual units, or is it pretty much just do whatever you want, i.e. I can take 4 Doom Scythes and say I'm taking a Deathbringer Flight, not just 4 DS?

Scarey Nerd wrote:
Okay, I get the big picture - can you have formations in an unbound army, then? Obviously you can take the models, but do they just count as their individual units, or is it pretty much just do whatever you want, i.e. I can take 4 Doom Scythes and say I'm taking a Deathbringer Flight, not just 4 DS?

Yes, Formations are fully operational while the army is Unbound, and they get the full compliment of Special Rules they receive.

Though, these days, Unbound is becoming less and less desirable. Those armies who do not have a plethora of Formations to choose from have any strong incentive to run Unbound. Some of those Formations are just that good.

Charistoph wrote:
Though, these days, Unbound is becoming less and less desirable. Those armies who do not have a plethora of Formations to choose from have any strong incentive to run Unbound. Some of those Formations are just that good.

Yeah, I like Unbound simply because it's the best way to get my personal collection onto the field, since I don't have any tomb blades and can't run a decurion detachment yet anyway, but the Ever-Living rule of the Decurion detachment is so useful that in general I'd rather field that. Though of course, that means that my Wraiths will languish unless I buy a Spyder, etc.

The Decurion is a detachment, its not a formation. Unbound would not get the Command Benefits of the Decurion.

Scarey Nerd wrote:

Charistoph wrote:
Though, these days, Unbound is becoming less and less desirable. Those armies who do not have a plethora of Formations to choose from have any strong incentive to run Unbound. Some of those Formations are just that good.

Yeah, I like Unbound simply because it's the best way to get my personal collection onto the field, since I don't have any tomb blades and can't run a decurion detachment yet anyway, but the Ever-Living rule of the Decurion detachment is so useful that in general I'd rather field that. Though of course, that means that my Wraiths will languish unless I buy a Spyder, etc.

Finished my Tomb Blades and got to use them for the first time last week. Go out and buy some. The Decurion bonuses alone make them worth the money. The unit itself is very useful, too. Gives Necrons some much-needed mobility and the models are pretty cool looking, too. Seriously, though, the 4+ RP is what makes Necrons OP.

 Ghaz wrote:
The Decurion is a detachment, its not a formation. Unbound would not get the Command Benefits of the Decurion.

No I get that, that's what I mean that I like Unbound to get my units on the field but I want to run a Decurion detachment so that I can get the command benefit.

 Ghaz wrote:
The Decurion is a detachment, its not a formation. Unbound would not get the Command Benefits of the Decurion.

Which is why Scarey Nerd said that he would rather field the Decurion than going unbound, but that he can't since he's laking Blades and couldn't bring Wraith w/o buying a Spyder first..