From Warhammer 40k - Lexicanum
The Crimson Blades are a Blood Angels Successor Chapter.
The Flesh Tearer Thuriel is a critic of the Chapter and says the Crimson Blades have lowered themselves to superstition and mysticism, like the Flesh Eaters and Mortifactors. He also says these Chapters' once-noble traditions have been infected by the fallacies of their Homeworld and that they are now savages who do not deserve their status.
- 1: Wrath of the Lost (Novel), Chapter 4