Yup, quite clearly Black Legion.

Two things stand out to me: Seeing Abbadon painted takes me back. And I really like how you've dealt with the liquids in Fabius Bile's (in the German version the called him Fabius Gallus. Which kinda makes sense, because Bile = Galle in German, but it also makes him either a rooster or a Gaul.

) round container things there. You didn't go for "red liquid, blue-ish body of glass" on his injector, which always looks a bit weird at second glance. The two-reds-variant I really like. I also like the cloudy look in the vials on his back.