Surtr

Surtr is the Ruler of Muspelheim and the Lord of the Fire Jotnar, a subspecies of Jotnar native to his fiery realm. He guards the gateway to Muspelheim, protecting the realm and his people from the threats of the Aesir. He is considered the greatest enemy to the Norse Gods as he is prophesied to burn Asgard to ashes alongside his army.

Background
At sometime around the birth of Ymir, Surtr came into existences from the primordial volcanoes of Muspelheim. As Ymir birthed his children, Surtr remained largely idle within his fiery realm and simply wandering with no singular purpose to call his own. His goal would change with the death of his fellow Primordial Jotnar, as he dedicated himself to avenging his death and bringing down the World Tree that grew in his place.

Since he set his new path, Surtr began to train himself for the eventual day that he would destroy Ymir's killers and their creations. He has set himself to be the guardian to his realm in order to protect it from the Aesir after Odin had infiltrated it so he could steal Eitr to further his creation of the cosmos. Only he has access to the gates of Muspelheim, with those who have pure intentions being allowed to enter the realm, and he has fought off several attempted incursions by the Aesir.

Turning Course
Odin, after receiving the revelation about the prophecy and his own attempts being what sets the course of Ragnarok, attempted to negotiate with the King of Flames. Obviously skeptical at first, believing it to be a simple trick, Surtr was eventually convinced of his desire for peace and entering talks with the Allfather. In the end, Surtr demanded the permanent deaths of all those who had assisted the Allfather in Ymir's murder, particularly Vili and Ve, along with a century of enslavement within Muspelheim and knowing there was no other alternative, Odin's brothers agreed to the deal. Vili and Ve were beheaded by Surtr himself and Odin was thrown into chains as he spent the next 100 years as Surtr's slave.

When the century-long deal reached its end, Odin was sent back to Asgard in a near-death state from all the suffering and torture that the Primordial Jotunn put him through. Although he no longer desired to blindly destroy the Nine Worlds and Asgard with it, Surtr remained vigilant against possible betrayal.

Personality
Since the death of Ymir, Surtr has devoted his entire being into the destruction of Asgard and the Nine Worlds, while setting Ymir's remains to rest. He has dedicated every waking hour training himself and building his army of Fire Giants within Muspelheim, never taking a moment for himself.

Powers & Abilities
From his constant training throughout the ages, Surtr has trained himself to being able to resist the effects of most divine weapons and abilities utilized by the Norse Gods, with only the most powerful of their warriors being capable of hurting him. Only Odin, Thor, of Freyr is capable of battling the Primordial Jotnar of Flame on an even scale.


 * Immortality: As he is one of two primordial Jotnar, Surtr is considered immortal as he has not aged beyond a certain point following the creation of the Nine Worlds. He is immune to ordinary weaponry and most magical ones, only being killed or injured by exceptionally powerful examples.


 * Creation: Surtr has the ability to create Sons of Muspel from the Eitr that flows through the lava of Muspelheim.


 * Thermokinesis: Surtr has command over extremely powerful flames capable of extreme temperatures that can render even a god into a pile of ash and burn down an entire realm. His presence is enough to heat the air around him, as well as conjuring flame pillars and breath fire that can render regeneration useless.

Equipment

 * Obsidian Sword: Surtr wields an immensely powerful sword which he forged from the very volcanoes of Muspelheim. Made from magically enchanted Obsidian and doused in primordial flames, the Obsidian Sword is capable of cutting through any defences that the Aesir or Vanir could muster.