'''Esca''' was a [[Codicier]] of the [[World Eaters]] during the [[Great Crusade]] and [[Horus Heresy]]. {{Fn|1}} Like the few [[Librarian]]s remaining within the Legion, Esca was not implanted with the [[Butcher's Nails]] due to their hindering of psychic ability, and thus kept much of his sanity. Shunned by his own Legion and badly scarred after the [[Battle of Isstvan III]], Esca served in the command squad of Captain [[Kharn]] during the Heresy. During the [[Shadow Crusade]] Esca attempted to save his [[Primarch]] [[Angron]] as he was ascending to a [[Daemon Prince]] thanks to the sorcerer of [[Lorgar]]. However Angron instead murdered Esca, using him as a final sacrifice for his transformation.{{Fn|1}}