>>96375057
Black Legion Kill Team and each dude will be from a different legion (within the Black Legion).
They will also hate each other.

>>96274036
>>96274047
People assume that Grey Knights will be fighting Against Custodes, Sisters and a whole bunch of other nonsense and they are WRONG.

Terminus Decree is to be enacted during the end times when everything goes to shit. What wakes up from the Throne might not even be The Emperor and everyone will be fighting that THING.

>>96248390
Actually you're wrong, marines have consistently lost models since 8th edition. The only things that have gotten updated in three editions are Terminators, Scouts, and Drop Pods. And the new Drop Pods suck. Otherwise they've lost pretty much half the codex, including virtually all of their HQ options.