Cotiere/Craftworld custom question

Reading the new craftworlds codex along with the imperial armor xenos it seems as though I could make my own craftworld, with whatever attribute I want, and alter any of the <craftworld> <cotiere> <conclave> accordingly and have them fit. Am I missing something here, or could I theoretically have a craftworld of elf space pirates rampaging around the universe?

You can create your own <craftworld> keyword, or <coterie> keyword, or <conclave> keyword, or <kabal> keyword, or <chapter> keyword and so on but they will remain a <craftworld> keyword, or a <coterie> keyword, or a <conclave> keyword, or a <kabal> keyword, or a <chapter> keyword

So you can't create a MYCRAFTWORLD keyword and replace all the <craftworld>, <coterie> and <conclave> instances

What you can do is create a <craftworld> keyword called MYCRAFTWORLD and replace all the <craftworld> instance in your detachment with MYCRAFTWORLD and all those units will have the Craftworld Attribute that you have chosen for your keyword from the 5 Craftworld Attributes in the book (keep in mind that you will not get access to the stratagems / relics / warlord traits that are specific to the 5 main Craftworlds)

Then, you can create <coterie> keyword (or one or more types of keyword) and call it MYCRAFTWORLD too and apply it to the relevant units but it will not be the same thing as the <craftworld> keyword you created before (so no Craftworld Attributes for your Corsairs)

I can still have an Alderi army though, but only the craftworld units would get any craftworld bonuses though, correct?

You need to run pure detachments of one craftworld to get the benefits - you can't run Alaitoc Rangers and ulthwe warlocks and get both benefits in the same detachment.

Duke Swajius wrote:

I can still have an Alderi army though, but only the craftworld units would get any craftworld bonuses though, correct?

Not entirely. It will depend on how your Aeldari army is built

Only CraftWorlds Detachments get the Craftworld Attributes rule and a CraftWorlds Detachment is a detachment that contains only Asuryani units.

So, if your Aeldari army is made of, let's say, an Asuryani-only detachment and a Aeldari one (with a mix of Asuryani and Drukhari units for example) only the Asuryani units in the first detachment will benefit from the Attribute of their Craftworld keyword (if all units share the same Craftworld keyword, Phoenix Lords excluded). The Asuryani units in the Aeldari detachment will not get the Craftworld Attribute at all.

Ok, that's good I like a mix for the pirate theme.