Legio Gryphonicus - Notable Titans: Warscorn (Imperator-class Titan) - The Warscorn was an Imperator-class Titan of the Legio Gryphonicus  that fought in the Third Battle of Nyrcon as part of the wider Battle of Beta-Garmon, also known as the "Titandeath."Aureum Castigtor (Warmaster-class Titan) - The exact number of Warmaster Heavy Battle Titans that existed prior to the Horus Heresy is, by virtue of the secretive existence they led, impossible to determine. Even the most ancient and lauded of Titan Legions such as the Legio Gryphonicus are estimated, at most, to have been capable of fielding less than half a dozen Warmaster Titans. The Aureum Castigtor depicted above is an example of a War Griffons Warmaster Heavy Battle Titan, one of three such god-engines that can be definitively placed in service to the Legio. Suzerain Pattern Plasma Destructors were a common component of a Warmaster Titan's loadout, capable of the annihilation of all but the mightiest of edifices with contemptuous ease.Argent Monarch (Warlord-class Titan) - An ancient Warlord-class Battle Titan depicted below that fought during the Great Crusade and Horus Heresy eras.Iron Regent (Warlord-class Titan) - An ancient Warlord-class Battle Titan that was deployed to the Battle of Tallarn during the Horus Heresy.Aeterno Rex (Reaver-class Titan) - An ancient Reaver-class Battle Titan that was destroyed by the Knights of House Perdaxia at the Ruin of Maerdan during the Horus Heresy.Dominatus Revok (Reaver-class Titan) - An ancient Reaver-class Battle Titan that fought during the Great Crusade and Horus Heresy eras.Exaro (Reaver-class Titan) - The Exaro took part in the campaign on Betalis III and was the war engine of the commander of the larger maniple which operated there.Fidelis Natus (Reaver-class Titan) - An ancient Reaver-class Battle Titan that fought during the Great Crusade and Horus Heresy eras.Invictus Nova (Reaver-class Titan) - The Invictus Nova is the most ancient war engine within the Legio Gryphonicus. Over its millennia of existence, the Invictus Nova has seen action against many of the xenos races infesting the galaxy. Its previous experience fighting Aeldari Revenant-class Titans was crucial to the Imperial Titans' success during the defence of Betalis III. The vital intelligence stored within the Invictus Nova's  Cogitators enabled its Princeps to quickly locate the vulnerable points within the similarly designed Aeldari Phantom-class Titans' holo-fields, and although none of the xenos Phantoms were destroyed outright, the Titans of the War Griffons inflicted enough damage upon to cause them to retreat from the field. The machine itself was damaged during its first encounter with Eldar Titans, but it continued to take part in battlefield operations.Paladin Argentus (Reaver-class Titan) - An ancient Reaver-class Battle Titan that led War Maniple "Herald Imperator" in the defence of Paramar V during the open days of the Horus Heresy. War Maniple "Herald Imperator" was stationed at the Paramar Nexus landing fields at the time of the 1st Battle of Paramar. The Titans had all undergone extensive repairs following damage sustained in battle against apex-grade xenos entities in the Golgothan Wastes, and the maniple had only been declared fit for active service mere days before the Alpha Legion attack. All were to fall in glory against the Traitor Legio Fureans (Tiger Eyes), the names of Titans, Princeps and Moderatii alike carved into the brazen Wall of Honour on their distant home Forge World.Celaritas Rex (Warhound-class Titan) - Celaritas Rex served as a part of War Maniple "Herald Imperator" and fell in glory during the 1st Battle of Paramar on the world of Paramar V during the opening days of the Horus Heresy.Gladius Lucida (Warhound-class Titan) - Gladius Lucida served as a part of War Maniple "Herald Imperator" and fell in glory during the 1st Battle of Paramar on the world of Paramar V during the opening days of the Horus Heresy.Magna Canis (Warhound-class Titan) - Magna Canis was one of two Warhound Scout Titans that was a part of the demi-maniple Invictus which supported the Reaver Battle Titan Invictus Nova. During an engagement on the Alacian Plains on Betalis III, the Magna Canis suffered catastrophic damage under the assault of an Eldar Phantom-class Titan, resulting in its destruction.Nobilis (Warhound-class Titan) - Nobilis fought in the Ullanor Campaign during the Great Crusade.Tempus Prima (Warhound-class Titan) - Tempus Prima was one of two Warhound Scout Titans that were a part of the demi-maniple Invictus which supported the Reaver Battle Titan Invictus Nova.Venator Lux (Warhound-class Titan) - Aeterno Rex fought in the Ruin of Maerdan during the Horus Heresy.Dictatio (Reaver-class Titan) - The Dictatio is a Reaver Titan active with the Legion in the late 41st Millennium.