M'kar

M'kar the Reborn was Maloq Kartho, Dark Apostle under Hol Beloth at Calth, a Word Bearer who spent the Underworld War turning survivors into offerings. He chased Oll Persson across centuries with a daemon's homework, then fell through his own warp rift and came back wearing a prince's hide.

He spent M41 trying to own Ultramar in pieces: Acralem against Draigo, the Halamar Rift against Sicarius, the star fort Indomitable against Calgar, who only bottled him in a warp core. Honsou uncorked that bottle and let M'kar wear a Dreadnought while the Bloodborn washed over Talassar.

Uriel Ventris brought the Shard of Erebus from Ventanus's tomb. Calgar spoke the mortal name and cut the throat. True death, not a pause. Ultramar has the receipt.