The proximity of Chrysis to [[Mars]] meant that the knightly houses of Chrysis were able to swiftly resupply their Knights with new weapons and equipment.{{Fn|1a}} Krast was foremost amongst these houses, and their martial strength was increased even more by their new alliance with the [[Mechanicum]]. House Krast gladly did Mars's bidding, marching at their new masters' order to fight in the [[Emperor]]’s wars, leaving the lesser houses of Chrysis to consolidate the alliance with the Mechanicum. However, Chrysis's closeness with Mars ultimately proved its undoing when the full might of [[Horus]]’ traitor forces descended upon the Knight World as he carved a bloody path across the [[galaxy]] towards [[Terra]]. The Knights of House Krast returned to their planet only to find it devastated and the lesser houses all but erased from existence.{{Fn|1a}} By the end of the [[Horus Heresy]], House Krast had been reduced from 400 Knights to just 100, with those who survived swearing oaths of vengeance against the Traitors.{{Fn|8a}} Ever since the Heresy, the Knights of House Krast have vowed that whenever the threat of [[Chaos]] rears its malformed head, they will be there to sever it at the neck.{{Fn|1a}}

House Krast holds great enmity for the forces of [[Chaos]]. However, they reserve particular hatred for the [[Traitor Titan]]s of the [[Legio Mortis]] (the Death's Heads). Krast and Mortis often fought alongside each other during the Great Crusade due to their ties to Mars, only for the Death's Heads to join Horus's cause, fall to the worship of [[Nurgle]] and lead the Traitor forces in the conflict which saw the devastation of Chrysis and the destruction of the other Knight Houses of that world.{{Fn|1b}}

*[[Anjae Narin Krast XI]] - [[High Monarch|Princeps]]{{Fn|13a}}

*[[Talvas Krast]] - [[Baroness Prime]] and [[Forge Master (Knight)|Forge Master]]{{Fn|13a}}

*[[Sorgonn Krast]] - Baron Prime and [[Master of Lore]]{{Fn|13a}}

*[[Sytonomeia Grel]] - [[Pontifex-Mechanicus]] and [[Forge Lord (Adeptus Mechanicus)|Forge Lord]] of [[Mars]]{{Fn|13a}}

*[[Kyrillus Vestoban]] - Emissary Questoris and Magos-Solius{{Fn|13a}}

====Insulated Chivalric Orders====

*Multiple sources state that House Krast's symbol prior to the Horus Heresy was a lion rampant.{{Fn|1b}}{{Fn|3}}{{Fn|10a}} However, [[Adeptus Titanicus: Loyalist Legios]] instead displays a square cross as the house's emblem.{{Fn|8a}}

*[[List of Knight Houses]]