Changes

What emerged from the warp bore little resemblance to what had gone in. The Marines' once gleaming armour was corroded and shattered, barely containing their bloated, pustule covered bodies. Their weapons and armour were powered by the energies of Chaos and they became known as the [[Plague Marine]]s, although they would still use the name Death Guard{{Fn|7}}. During the [[Siege of Terra]] Mortarion was the last of the traitor Primarch's to appear in the [[Sol System]]. The Lord of Death appeared aboard the ''[[Vengeful Spirit]]'', his putrid stench sending all but Horus, [[Abaddon]], and [[Tormageddon]] into convulsions. True to his earlier pledge, Horus let Mortarion's Death Guard be the first to land upon Terra.{{Fn|18}} During the battle on Terra he oversaw the siege of the Western regions of the Palace, spreading plague and misery wherever he appeared. Unlike Angron and Fulgrim, he did not even attempt to penetrate the Emperor's psychic shield around the Palace.{{Fn|19}} During a war council he mocked [[Perturabo]] for not fully embracing Chaos but nonetheless allowed [[Typhus]] to work with the [[Iron Warriors]] Primarch as part of a ritual to weaken the Emperor's psychic shield of the Palace.{{Fn|19a}} Mortarion next met with [[Magnus]] in order to discuss an attack on the [[Colossi Gate]], revealing to his brother that he hated his current Daemonic visage and was in constant pain. Magnus helped Mortarion control his new abilities, allowing the Primarch to regain his lost composure. Grateful, Mortarion immediately organized organised an attack on the Colossi Gate that Magnus would use as a screen while he infiltrated the [[Imperial Dungeon]].{{Fn|21}}