Melchiah is one of the villains from Legacy of Kain: Soul Reaver.
Melchiah was formerly a Sarafan Inquisitor, who hunted down vampires ordered by Moebius. He is killed by the wraith Raziel, who came from the future. Centuries later, when Kain rises his vampiric empire, he resurrects Melchiah as one of his lieutenants. Melchiah was the last Sarafan to be risen, so he received the weakest portion of Kain's soul, and thus was the weakest of them all. Melchiah's body were always rotting, forcing him to scalp his victims and use their skin to hide his putrefaction.
After Raziel, first-born of Kain's lieutenants, was thrown into the abyss labeled as a traitor, all the vampire clans scattered through Nosgoth. Melchiah and his clan moved to the Necropolis. Melchiah degenerated into a monstrous thing with enormous arms and head but no legs, forced to take the flesh of his victims and add them to his own, as the members of his clan suffered from similar fate, forced to defile the graves after some flesh to replace their own. When Raziel arose from the abyss as a wraith, he made Melchiah the first target for his revenge.
When the two meet, Raziel obviously doesn't recognize Melchiah. Melchiah tells him much has changed since he was thrown into the abyss, and that he feels repulse from himself. The two fight each other, and Raziel traps Melchiah in the middle of his meat-grinder, demanding to know where Kain is. Melchiah tells him Kain only appears where and when it pleases him. Raziel activates the grinder, crushing Melchiah, who thanks Raziel for “releasing” him.