Gamers who want to don the mantle of a demon slayer would love to fight Diablo, the Lord of Terror, in Blizzard's hit Diablo franchise. As with all titular villains, Diablo somehow finds repeated ways to resurface in Sanctuary, becoming more powerful with each "resurrection." Though players must gather the strength to go toe to toe with the Prime Evil, Diablo is never alone in his conquest.

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One of his allies is the cunning Mephisto, Lord of Hatred. Despite his unimposing title, Mephisto has orchestrated some of the most interesting schemes throughout the Eternal Conflict. What else should players know about the Lord of Hatred?

10 The More Tactical Side Of Evil

As with the other lords of the Burning Hells, Mephisto belongs to the Great Evils. This means he spawned directly from one of the heads of Tathamet, the embodiment of chaos itself. His rulership over the Realm of Hatred makes him one of the Prime Evils, the most powerful denizens of Hell alongside his brothers Diablo and Baal.

Unlike other demons who preferred to do battle with the High Heavens upfront, Mephisto likes to scheme from the shadows. Therefore, he's credited as one of the Burning Hells' greatest tacticians.

9 He Started The Sin War

Of the Prime Evils, it's Mephisto that noticed the retreat of angels in one of their battles in Pandemonium. When Mephisto and his forces retreated to analyze the situation, Baal discovered the theft of the Worldstone. Apparently, Lilith and Inarius had created a new world form the Worldstone – Sanctuary – to escape the conflict.

Sensing the lack of intervention from the High Heavens, Mephisto and the Prime Evils seized this opportunity to start corrupting humanity. They formed the Triune, a religion in which humanity worshipped the Prime Evils as benevolent deities. The Archangel Inarius attempted to stop their corruption by creating the Cathedral of Light. Mephisto then initiated the Sin War, in which where both the Triune and the Cathedral secretly tried to control Sanctuary.

8 He May Be The Key To The Dark Exile

The Sin War escalated, and both the Burning Hells and the High Heavens started to bring their armies to the surface. Only when the Edyrem Uldyssian sacrificed himself to wipe out the Nephalem's powers did the conflict cease. After the Sin War, Mephisto met with the Archangels of the Angiris Council to strike a bargain.

Neither Heaven nor Hell can touch the humans in Sanctuary. This ceasefire led to anger on the part of the Lesser Evils, which plotted to banish the Prime Evils to Sanctuary in what was called the Dark Exile. However, the Dark Exile was a part of the Prime Evils' plans (or perhaps only Mephisto's) for the three to gain access to Sanctuary and build power there.

7 He's Quite A Social Prime Evil

Aside from Diablo himself, Mephisto has had perhaps the most interesting interactions as a Prime Evil. Mephisto personally mentored Belial, which may explain why Belial has become quite a cunning general of his own.

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Perhaps most interesting is the fact that Mephisto has a daughter: Lilith, the Daughter of Hatred. As of Diablo 3, the franchise has not established the full extent of the relationship between Mephisto and Lilith. Moreover, it's still unknown whether Mephisto harbored hatred towards Baal, especially after the Lord of Destruction suggested Lilith's demise for her theft of the Soulstone.

6 A Relationship With The Nephalem & The High Heavens

While  Mephisto harbors a hatred for everything, he especially had a particular kind of hatred towards the Nephalem. As fans might remember, the forbidden relationship between Lilith and Archangel Inarius birthed Rathma, the first Nephalem and the first Necromancer. This means that Mephisto technically serves as the grandfather of all Nephalem –the creatures that would be his undoing.

To make matters worse, this also means Mephisto is the father-in-law of Archangel Inarius. This situation would have become a weird family setup, were it not for the High Heavens giving Inarius to Mephisto as a part of their "deal" regarding Sanctuary.

5 He Uses Hatred As A Tool

Though Mephisto loathes everything, he still sees everything as something to be utilized. In fact, the Prime Evil views hatred as a tool that must be wielded properly and precicely. It's Mephisto's goals to pit entire civilizations against each other, to sow distrust wherever he can. These desires and Mephisto's relentless pursuit to accomplish them make him a frightening tactician and unifying force in the Burning Hells.

Of the forces of light, Mephisto hates angels the most. He also believes that Sanctuary's inhabitants can become his weapons against the High Heavens. As the edgy Prime Evil that he is, Mephisto doesn't like companionship, and considers it "a comfort of the wretched."

4 Mephisto's Relationships Are Complex

Even Mephisto's brothers aren't immune from his scheming. Some say that Mephisto himself loves pitting Baal and Diablo against each other, often for his amusement. However, the two brothers often follow Mephisto's plans, no matter how convoluted they may seem. Some believe that the two Prime Evils simply tolerate Mephisto's schemes, as they further their ambitions in some form of fashion.

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Interestingly, though he loathes Archangel Tyrael and other forces of light, the Lord of Hatred seems to respect Archangel Auriel, the Aspect of Hope. According to Mephisto, Auriel possesses "the only virtue with purpose."

3 Hell Is Where Mephisto Is

Of the three Prime Evils, Mephisto is often considered the most intelligent and cunning. In fact, some state that Mephisto could serve as the closest thing to a "leader" in the Burning Hells.

Even Mephisto acknowledges this rumor. One of Mephisto's lines states, "where I am is Hell." Following this, some might speculate that Mephisto is responsible for whatever internal structure the Burning Hells follows. His cunning and intellect may explain why his daughter Lilith was able to devise her plan of stealing the Worldstone with Inarius to escape the Eternal Conflict.

2 The Mystery Of His True Form

Of the three Prime Evils, Mephisto has perhaps the most gruesome appearance, appearing as a being of pure muscle and bone. He has a head with two large horns, four arms, and a slithering body devoid of legs. Interestingly, Diablo 3 shows Mephisto with a different form, with more prominent horns, arachnid legs, and chains wrapped around his appendages.

Mephisto's overall appearance across media has varied widely. For instance, the "Book of Cain" sourcebook and Heroes of the Storm feature vastly different designs as well. Fans may want to pay extra attention to Mephisto's lines in the MOBA. Mephisto hints that his appearance in this medium is just an "intermediary" form.

1 The Faustian Origin Of His Name

Literature and horror fans should immediately recognize Mephisto's namesake. In popular culture, "Mephisto" is a variation of Mephistopheles, the demonic figure from the Faustian legend. When discussing Faustian stories, Mephistopheles is often used as an alternative name for Lucifer or Satan.

Linguists may see Mephistopheles as a combination of two Hebrew words. The first word "Mephis" means "Distributor," and the second "Tophel" means "Falsehood." When combined, "Mephistopheles" may mean "Distributor of Falsehoods," which describes his deceitful nature. Meanwhile, his title "Odium" may refer the word that means "intense dislike or hatred," reflecting his title as Lord of Hatred.

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