Changes

During [[Siege of Terra]] the Legio Mortis was unleashed in full, sending hundreds of Titans towards the Mercury-Exultant Killzone of the [[Imperial Palace]] defenses. Led by the ''[[Dies Irae]]'', by this point the Legio Mortis had been heavily corrupted by the powers of [[Chaos]] and many of its Titans demonstrated the ability to regenerate from damage or operate independently of a Princeps.{{Fn|12a}} During the battle for the Mercury-Exultant Killzone, the Legio Mortis annihilated their long-hated enemy, the [[Legio Ignatum]].{{Fn|12b}}

===Post-Heresy===