Board Thread:Warhammer 40k General Discussion/@comment-4851119-20140118095944/@comment-4851119-20140201101835

...isnt there a Chapter in M41 that is able to 'breathe' fire due to a mutation of their Belcher's Gland? Yup, the Fire Lords. They're explicitly stated to be a later founding successor of the Imperial Fists tho.

Don't Fire Lords Chaplains drink promethium or some weirdness like that?