Loki (Earth-1638)

"Such bluster. How very typical. Ever the sheltered daughter. So many fractured delusions. You know nothing of war. For all these countless millennia, when it comes to the two of us, you seem to have avoided the simplest of conclusions. Instead, you feel the incessant need to avenge every wrong you perceive from your position of languid morality...as if it were some sort of game. Quite sad. But if it's a war you truly desire, Valkyrie, then I can happily provide it."

- - Loki to Valkyrie

Loki was the adoptive son of the King of Asgard Odin, who, when learned of his true heritage as the son of Laufey, betrayed his adoptive family and world by allying with Surtur and other enemies and dangerous individuals of the Nine Realms, bringing forth Ragnarök and killing all Asgardians. He was ultimately banished to Midgard by Odin with the last of his power. For the ages, Loki amassed power, being finally fueled with the violence brought by humanity during World War II through the Nazis and Grigori Rasputin, who attempted to harness the power of the Tesseract to unleash the interdimensional Ogdru Jahad.