wuestenfux wrote:Yes, you need the
SM codex plus the
BA supplement.
In former editions,
BA had a stand-alone codex but these days are gone.
Originally
BA had to share a codex with the
DA, I think it was called Angels of Death back in second. They were also just a supplement booklet to the main
SM codex in 3rd or 4th edition.
Really they have just gone back to how they used to be with the other 5 first foundings also getting a bit of extra love (to be honest up until 8th it was Codex Ultramarines in all but name like it was back in Second)