Changes

In the original background, Typhon/Typhus was a [[Librarian]] of the Death Guard possessing the rank of "Captain-Epistolary". However, the [[Horus Heresy Seriesseries]] ret-cons his position to that of First Captain and, accordingly, he appears not to have any psychic abilities.{{Fn|4}} The novella ''[[The Lion (Novella)|The Lion]]'' by [[Gav Thorpe]] rectifies this, stating that Typhon/Typhus is a minor psyker and prior to Mortarion's joining with the Dusk Raiders he actively trained his powers. As Mortarion did not like or trust psykers Typhon/Typhus stopped training and using his powers and focused on his duties as First Captain. He resumed using them in secret after the Death Guard's declaration for Horus.{{Fn|5}}

Additionally, Typhon/Typhus was originally said to have been born on [[Barbarus]]{{Fn|3}}, but ''[[The Lion (Novella)|The Lion]]'' mentions that he had practiced as a Librarian in the Dusk Raiders Legion, before Mortarion assumed control and renamed it the Death Guard.{{Fn|5}} This implies that he may have been born elsewhere, perhaps on [[Terra]]. However, the short story "[[Daemonology (Short Story)|Daemonology]] " mentions that Mortarion spent an unspecified length of time on Terra between being rediscovered by the Emperor and assuming command.{{Fn|13}} It is possible that Typhon/Typhus was recruited from Barbarus and inducted into the Legion's [[Librarium|Librarius]] during this period, although this would require Mortarion to have been on Terra for several years (considering the amount of time required to [[Creation of a Space Marine|create a Space Marine]]).

The novel ''[[The Buried Dagger (Novel)|The Buried Dagger]] '' again rewrites Typhon's backstory, putting him back as a native of [[Barbarus]] and a [[Humanhuman]]/[[Overlord (Xenos)|Overlord]] hybrid.