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'''M'kar the Reborn''' was a [[Daemon Prince]]. His original name was '''Maloq Kartho''', a [[Dark Apostle]] of the [[Word Bearers]].{{Fn|4a}}

During the [[Horus Heresy]], Maloq Kartho was [[Dark Apostle]] to [[Hol Beloth]], one of the [[Word Bearers]] commanders during the [[Battle of Calth]].{{Fn|6a}} After Beloth's force was annihilated by orbital bombardment, the Word Bearers were forced underground by the gradual dispersion of Calth's atmosphere and the lethal solar radiation coming from the damaged sun.{{Fn|6b}}

Shortly before the evacuation of the planet, [[Oll Persson]], an ex-[[Imperial Army]] trooper who was in fact one of the last surviving [[Perpetual]]s, had, at the direction of [[John Grammaticus]], cut a hole in reality with an ''[[athame]]'' dagger taken from one of the Word Bearers' [[cult]]ists, and escaped with a small party of survivors. The daemonic entity known as M'kar was tasked with hunting them down before they could arrive at their ultimate destination. M'kar dogged Persson's footsteps across several planets and time periods (appearing sporadically throughout human history, such as at the Siege of Verdun in '''1916'''[[M2]]). It was on the verge of killing Persson and his entire party when it was "called away", presumably to keep its assignation with Maloq Kartho.{{Fn|9}}

During the [[Underworld War]], Kartho sacrificed [[Foedral Fell]] and the last remnants of his forces, as part of a trap to lure [[Remus Ventanus]] out of one of the main arcologies,{{Fn|8a}} so Kartho could detonate a [[virus bomb]] inside it.{{Fn|8b}} Ventanus would return just in time to stop the detonation and slay a daemonspawn-turned Hol Beloth with Beloth's own ''athame''. The rapidly-changing Kartho was thrown by an impact with a [[Land Speeder]] into a [[warp rift]] that he himself had opened. The virus bomb was likewise thrown into the warp rift, averting Kartho's attempted genocide of the remaining Ultramarines and Loyalist survivors.{{Fn|8c}} But as a reward for his bloody deeds on Calth - including wiping out several millions of survivors with atomics, offering Fell and Beloth's remaining forces as a final sacrifice, as well as attempting to definitely erase all life on Calth with the virus bomb - the [[Warp]] granted Kartho daemonhood, and he merged with the daemonic entity called M'kar.{{Fn|4a}}

M'kar was sighted again in 935.M41 when a [[daemonic]] horde took control of the star fort ''[[Indomitable]]'' located in the outer orbit of Calth. [[Marneus Calgar]], commanding [[Terminators]] from the Ultramarine's 1st Company, boarded the star fort and tore M'kar limb from limb, according to the official Chapter record.{{Fn|1}}{{Fn|4c}}

In 997.M41, M'kar transformed the entire [[Agri-World]] of [[Sondheim V]] into his private pandemonium. Shortly after, [[Hive Fleet]] [[Leviathan]] (or Hive Fleet [[Kraken]], depending on the source{{Fn|5}}) descended upon the planet, and the [[Sky Sentinels]] [[Chapter]] were dispatched to reclaim it. However, upon seeing the situation, they opted to call in [[Exterminatus]].{{Fn|3}}

A stay of execution was ordered by [[Grey Knights Grand Master|Grand Master]] [[Vardan Kai]] when he arrived at the planet leading a [[Grey Knights]] strike force. The Exterminatus was to be delayed to give enough time for the Grey Knights to capture the [[Book of Pandegaras]], a cursed tome which had given M'kar the power to alter the planet. The Grey Knights made planetfall and made it through the twisted landscape to the temple in which the book was stored, but they quickly became overwhelmed and trapped by both [[Tyranid]] and [[Daemon]]ic forces. Kai contacted the Sky Sentinels fleet and ordered them to bombard the temple site. The Grey Knights' superior armour protected them from the bombardments, but the Daemons and Tyranids were not so fortunate. As the bombing stopped, the Grey Knights evacuated with the Book of Pandegaras whilst the Sky Sentinels began Exterminatus of the planet. When the cleansing of the planet was completed, the Sky Sentinels surrendered themselves to the Grey Knights for [[mindwipe]].{{Fn|5}}

In 854999, M'kar attacked Ultramar again, this time with a large Chaos force. Some time before then, Warsmith [[Honsou]] of the [[Iron Warriors]] had learned of M'kar's existence and his long-standing hatred for the Ultramarines. With the help of [[The Despoiler]]'s damned seer, [[Moriana]], Honsou learned that Calgar had not, in fact, been able to destroy the daemon in 935.M41, but only to imprison its defeated essence inside the [[warp core]] of the ''Indomitable''. Calgar detailed half of the Ultramarines' Fifth Company to garrison the star fort and guide it on a constant, random journey in and out of the warp, but M'kar's hatred for the Ultramarines was so powerful that he always left a faint trail that could lead their enemies to him.{{Fn|7a}}

M'kar personally led the onslaught against [[Talassar]], while other Chaos warlords attacked Calth, [[Espandor]] and [[Tarentus]]. Calgar himself led the 1st Company to Talassar, determined to once again slay M'kar.{{Fn|4d}}

After weeks of being besieged in the ancient fortress of [[Castra Tanagra]] by M'kar's daemon army, the defending Ultramarines reached their lowest ebb when [[Chief Librarian]] [[Varro Tigurius]] was finally overcome by weariness, and the psychic barrier he had erected around the fortress failed.{{Fn|4e}} M'kar arrived in person to finish Calgar. Calgar was nearly overwhelmed, since M'kar was able to draw limitless power from the ''Indomitable'', but Tigurius suddenly rallied and unleashed a psychic burst that drove M'kar back and severed his connection to the star fort. Calgar rallied the 1st Company for a final charge against the daemons. Calgar was nearly defeated by M'kar, when reinforcements from the Ultramarines' 2nd and 4th Companies arrived, led by Captains [[Cato Sicarius|Sicarius]] and [[Uriel Ventris|Ventris]], the latter of whom had retrieved the [[Shard of Erebus]] from Captain Ventanus' tomb on Calth.{{Fn|4a}}

Uriel pronounced M'kar's [[True name|mortal name]] aloud, and threw the Shard to Calgar, who stabbed M'kar in the throat{{Fn|4}}. The power of the Shard was enough to destroy M'kar's essence, a [[True Death]] that destroyed the Daemon Prince once and for all.{{Fn|4a}}

*{{Endn|1}}: [[Codex: Space Marines (5th Edition)]], ppg. 40*{{Endn|2}}: [[Codex: Blood Angels (5th Edition)]], ppg. 16*{{Endn|3}}: [[Codex: Tyranids (5th Edition)]], ppg. 28

*{{Endn|5}}: [[Codex: Grey Knights (5th Edition)]], pgs. 14-1714–17

**{{Endn|6b}}: Ruin//Storm, Chapter Five, pgs. 401-403401–403

*{{Endn|9}}: ''[[Unmarked (Short Story)]]'' by '''Dan Abnett'''