The Invokers were a partially Codex Astartes-compliant Chapter of Adeptus Astartes of the Dark Angels' gene-seed. Deviant from the credos of the codex Astartes due to their heritage and training as one of the Unforgiven, they employ a Ravenwing, Deathwing and Two additional scout companies due to an unprecedented close relationship to the Exorcists chapter prior to their fall from grace.