1) when playing games against each other, assuming no other prior agreement has been made, are all armies required to be battle forged? (I specifically mean us, here, at Nagoya games days. Not gamers around the world playing 40k).
2) when building a battle forged army, is it the case that only ONE faction keyword (at least) needs to be shared in order for that detachment to be legal? E.g. On pg 57 of the chaos Index book it lists all possible units for a Death Guard army. Chosen, Raptors and Bikers do not appear on the list. So they can't be Death Guard. But codex CSM contains all those units, and they, along with the listed Death Guard units have the faction keywords "heretic astartes", "chaos" and "chaos god of choice, let's say, Nurgle". So, even though those units aren't allowed to have the Death Guard faction keyword, they could use any of their other, shared, keywords to be in the same detachment as a bunch of plague marines and Typhus? If so, what's the point of the Death Guard keyword? Or indeed, the whole system, as it relates to army composition (I can see how the various keywords affect gameplay, just not army composition). Why not just use the Chaos keyword and have Kairos Fateweaver and Annnnggrraaarath in your Death Guard army? (Aside from it being ass-hattery, I mean)
Cheers in advance, folks
