Iskandar Khayon - Abaddon's Blade: Khayon acted as "Abaddon's Blade" or assassin, for many years, though he initially failed to kill Abaddon's rival Thagus Daravek, a Death Guard Sorcerer of the Death Guard Legion. Khayon later recovered the mad prophetess Moriana for Abaddon, and only then at her urging did the new Warmaster of Chaos launch his 1st Black Crusade in order to recover the mighty Daemon Weapon Drach'nyen.As the war between Abaddon and Daravek continued, the two soon met on the dead Craftworld Taial'shara and each brought several of their warbands' leaders. Before they began negotiations, Daravek suggested they hold a duel between two of their warband Champions, which was customary when opposing Chaos Lords met with each other within the Eye of Terror. Abaddon once again agreed and selected Khayon, while Daravek selected the Iron Warriors Chaos Lord Ulrech Ansontyn.During the duel between their Champions, Daravek gloated to Abaddon about how his warband had invaded the Black Legion's worlds and slaughtered the forces left to defend them. This enraged Khayon and he defeated Ulrech with a frenzy of attacks. Khayon did not kill the Iron Warrior and instead offered Ulrech a place within the ranks of the Black Legion, but before Ulrech could accept the offer Daravek decapitated him.In his outrage, Khayon attacked the Chaos Lord, but Daravek shockingly used his own psychic powers to completely dominate the Black Legion Sorcerer and forced Khayon to kneel before him. Daravek laughed and told a dismayed Khayon, that he had defeated the Black Legion Sorcerer during the battle of Drol Kheir and then had bound Khayon's spirit to him before making the other Sorcerer forget their encounter. Before further conflict could break out between the two warbands, the Warp Ghost Saronos suddenly appeared and deescalated the situation.When both groups confronted the unexpected interloper, Saronos offered them a deal: he could lead one of the warbands out of the Eye of Terror for the first time, but only the one whose Chaos Lord met the Warp Ghosts' price. Saronos refused to detail what exactly the Warp Ghosts wanted, but though Daravek offered them warships, slaves and many of the things he possessed, it was Abaddon who won the deal.The Despoiler simply told Saronos that the Warp Ghosts could take what they needed from him. An enraged Daravek threatened Saronos, but returned to his fleet after the Warp Ghost Chaos Lord left with Abaddon's group to return to the Black Legion's flagship Vengeful Spirit. The Death Guard Sorcerer Lord then watched as Abaddon's fleet entered the Warp and escaped for the first time from the Eye of Terror.Despite this setback Daravek still maintained a psychic connection with Khayon which he used to guide his fleet out of the Eye of Terror as well. When Daravek's warband neared the Cadian Gate, they discovered Abaddon's fleet engaged in battle with the Black Templars Chapter of Loyalist Astartes and quickly fell upon the Black Legion's ships. Now trapped between two foes, Khayon, who was acting in Abaddon's stead aboard the Vengeful Spirit, ordered the Black Legion's fleet to break through the Black Templars blockade and escape into the Warp.Khayon ordered the Vengeful Spirit to attack Daravek's fleet, in an attempt to goad the Death Guard sorcerer to board the Black Legion flagship. Daravek did not hesitate to do so and led a massive assault on the Vengeful Spirit, personally slaying many of its defenders.Before Daravek could reach its bridge, he was confronted by Khayon and the two fought duelled each other once more -- though this time Daravek's attempt to psychically dominate the Black Legion Sorcerer failed. Khayon had prepared himself for their encounter and finally realised how Daravek had been able to best him in their earlier encounter.It was not Khayon's soul that Daravek had bound to him, but Khayon's past daemonic familiar Gyre who had been destroyed in battle with the clone of the Primarch Horus at the time of the Black Legion's founding. After Gyre had been banished into the Warp, Daravek secretly summoned it and bound it to him, which forced the Daemon to turn upon Khayon, though it still maintained a psychic connection to its former master.It was this connection that had allowed Daravek to force Khayon to do his will, but with Gyre drawn out from the Death Guard sorcerer, that weapon was blunted. Without this hold on Khayon, Daravek was easily overwhelmed by the Black Legion mage and decapitated, ending his threat to Abaddon's leadership of the Forces of Chaos once and for all.