He is considered noted in the most [[evilBook of Cain]] as the most cunning of the threeevils, using this overpowering evil to bring and is considered a more than capable tactician. He specializes in the creation of the dead [[undead|back to life]], filling them the corpses and monstrosities with unmatched hate for the living to create some and unleashing them upon his enemies, as fitting for the Lord of Hatred. He could be taken as charismatic and possibly even amicable, were it not for the most persistent [[zombie]] creations possibleevil of his words and his demonic tone.

Mephisto is known to be father of two demons: [[Lucion]] and [[Lilith]]. Mephisto's daughter was the lover of the rebel [[angel]] [[Inarius]], and together they created [[Sanctuary]]. Mephisto's son was Primus of the Triune, a church at its prime during the [[Sin War]] with very strong connections to the Prime Evils. Both of Mephisto's children had a big responsibility behind were heavily involved in the events of the Sin War, with Lilith being one of the core founders of the world of [[Sanctuary]]. [[Sin WarLucion]]was 'willed out of existence', leaving Lilith as being the only 'child' to technically still exist.

The Angiris Council didn't believe the word of a [[Lord Demon]]. However, Archangel [[Tyrael]] stepped forward and asked Mephisto if he was truly proposing a truce, in order to believe him, he had to cast his mark on a place of Tyrael's choosing. To this Mephisto agreed, with the condition he was given a prize for such a goodwill gesture.

The weakness was a lot more than the three had considered, however, and they were forced to possess a mortal body in order to keep from haemorrhaging hemorrhaging power. With bodies they could consume human souls for energy, and storing it up to the maximum power of their host body. Their demonic essences also warped the bodies to grotesque mirror images of their true demonic forms.

Mephisto made the use spells to shatter the Soulstone into seven shards, breaking the magical seal and freeing him. The six smaller shards were inserted into the left palms of six Zakarum [[archbishop]]s archbishops by Mephisto, and they were ordered to bring him human sacrifices as nourishment and running their temple. The largest shard pierced the hand of the [[Que-Hegan]] who had replaced [[Khalim]], known as [[Sankekur]]. The Que-Hegan is the highest divine authority of the Zakarum faith, and ; Khalim had been killed because he was uncorruptable by due to Mephisto's inability to corrupt him.

Mephisto used Sankekur's body to remain on the in [[mortal planeSanctuary]], warping it as normally happens with possessions. He used his power over the Zakarum faith to send emissaries to the west, eventually brining bringing [[Leoric|King Leoric]] to [[Tristram]], and ending with [[Diablo]] being freed in the guise of the [[Dark Wanderer]], who freed his brother [[Baal]], and the three met up in Mephisto's Durance of Hate in [[Kurast]]. For years, the corrupted religious leaders of the Zakarum kept Mephisto supplied with information and misguided followers to carry out his plans of conquest.

:''"Turning his eyes back to the cataclysmic sight below, Lord Lucion gestured toward the very center, where the worst of the carnage had and was still taking place. In the midst of everything, a black gemstone nearly as large as a man sat embedded in a triangular column of red-streaked marble. “Blood marble,” it was named, naturally. The stone was called by Malic’s master the Kiss of Mephisto, although the cleric had, from past comments, reason to believe that it had once been named for another of whom Lord Lucion would not speak." ([[Diablo: Birthright]])''

We have no confirmation yet if Mephisto will be featured was not present as a character in [[Diablo III]]. His existence only comes from the game story indicating that he is one of the seven souls to be trapped in the [[Black Soulstone]]. However, his minions (such as the [[Sin War]] era [[Morlu]]), like those of the other prime evils, were present in the [[High Heavens]].