Disclaimer: I don't own the Teen Titans. In this story, the Nine Realms are actually different planes of existence, instead of planets. Yggdrasil is still the world tree that connects the Nine Realms, though it doesn't play a particular big role. Enjoy!
A fierce fire raged across the Nine Realms. The sons of Muspelheim roared in fury as the destroyed the universe. Surtur chuckled, brandishing his flaming sword, swinging it wildly. The Aesir had failed, the Einherjar had failed, all of existence was doomed. Odin alone stood, Gungir held in his remaining arm. Blood dripped forward from his mouth, defiance burning in his eye.
Using Runic magic, the Allfather had secured the safety of Midgard, in hopes that the realm of mortals would survive the inferno and life would continue. By his blood that plane of existence would have time, time maybe to gather strength, to fight this threat. Might heroes worthy of the warriors of old protected that plane, more specifically Earth.
"So, you still live, Allfather!" Surtur bellowed. "You are nothing! A pathetic, wounded fly making a defiant stand before the mightiest son of Muspelheim! Why fight, Odin? Lie down and die, like the rest of your ilk."
"Never! As long as I draw breath, as long as I can fight, I will resist you. To the bitter end!" Odin roared, charging towards the behemoth. Gungir grazed Surtur's right shoulder as he brought his sword down. Odin dodged to the side, attempting to impale Surtur on his spear.
The fire jotun sidestepped and lunged, creating a deep gash in Odin's left side. The King of the Gods stumbled back, inhaling sharply. Despite the pain, Odin trudged forward. He stopped after a few feet, examining Surtur, who was shaking his head and laughing. Once chance, that's all I have. Gungir had never failed him in the past; it would not do so now. Raising the might spear high above his head, Odin let loose a war cry and threw Gungir.
The spear took Surtur's head off. The other fire jotun shrieked and howled in rage as their might leader fell; they advanced upon the Allfather, weapons bared and ready. Odin was weaponless, but he charged, falling upon them in a blind fury.
In the end, another three fire jotun were dead, and Odin's lone eye stared up into the smoke and ember filled skies. Thus Odin passed away, and Midgard was protected.
For a time.
To be continued…