The Exorcists ' gene-seed is supposedly made from particularly resilient [[Imperial Fists]] stock. However it is considered an anamolyanomaly, as no other sons of [[Rogal Dorn|Dorn]] display the Exorcists ' resilience to the Daemonic. In another anamolyanomaly, the Exorcists display no outward similarities to Dorn or other Imperial Fists successors. The Exorcists bare bear no fraternal ties to other Imperial Fists successor Chapters, and their battle-cries make no mention of their preimogenitor primogenitor Rogal Dorn. Only upon initiation to the 1st Company are Exorcists even told of their descendence descendance from Dorn. This truth is held as a great secret by the Chapter.{{Fn|14}}