The Mythos Angelica Mortis is a tome listing a group of twenty Space Marine chapters known as the Astartes Praeses. The tome claims that these chapters were founded to guard the regions surrounding the Eye of Terror. Although the names and status' of all the chapters are not known. Known chapters that are a part of this group include the Excoriators, the Marines Exemplar, the Night Watch, the Relictors, the Subjugators and the White Consuls.