Along with this singular suit of Terminator Armour, Malevolous also crafted a special weapon to complement this deadly creation. This weapon was a unique Lightning Claw which incorporated a baroquely-styled twin Combi-Bolter. The Talon quickly became Horus' favoured weapon and a symbol of his office as the Imperial Warmaster of the Great Crusade. Some apocryphal sources claim it is an antediluvian relic that was found deep on the planet Clthon, and was a product of Mankind's Dark Age of Technology. Whatever the truth, the Talon played a dark role in the Imperium's history. During the Battle of Terra aboard his flagship Vengeful Spirit, Horus used his taloned claw to kill his own brother Sanguinius, the winged Primarch of the Blood Angels Legion, and to mortally wound the Emperor Himself.