Gorr the God Butcher

Courtesy of marvel.wikia.com :

Gorr The God Butcher was born on a planet with no name, almost everyday on the brink of starvation. He was taught to trust in the gods but they never answered his prayers. At a early age his mother and father died and he was left on his own. He then had to fend for himself in the harsh environment, years later he married and fathered some children but most of them died and when his pregnant mate Arra was killed during an earthquake he was left with one son who was on the brink of death. While trying to reach what was believed to be a forest his son died while Gorr was promising him that when they reach the forest he will never go hungry again. Stricken with grief Gorr gave up hope believed there was no gods. However after learning they actually existed Gorr vowed vengeance for no god ever answering his prayers. Gorr despises any god and seeks to kill all of them, and according to Gorr himself he killed many gods of fear, war, chaos, genocide, revenge, plagues, earthquake, blood, wrath, jealousy, death, degradation and very few gods of poetry and flowers.
After killing a god from America, the body washed up on the shores of Iceland where it was found by Thor. At a later date, while accompanying a Viking raiding party to Russia, Thor found some of the Slavic gods dead. Thor encountered Gorr who attacked him. Gorr nearly managed to kill Thor, but just before the killing blow, Thor conjured a lightning strike which knocked both of them out. Gorr recovered and escaped to a cave, where he once again fought Thor who believed he had succeeded in slaying him.

Gorr survived their encounter however and would spend the next thousand years butchering more and more gods, growing ever stronger and amassing an army of dark minions. Thor once again took notice of Gorr's activities and began hunting him. While Thor ventured to the cave looking for him where they once fought, Gorr was busy somewhere else, making a portal through time from god's blood. He went back and slayed the very first god, taking his heart as a trophy. He then headed forward in time, where he met the Thor of many millenia in the future, saving him for last. Thor of the present quickly found his trail and went into the portal, but arrived in the future a few hundred years after Gorr. The only god left was his future self, who resembled his father greatly.

Little did the two Thors know was that Gorr had made another trip into the past to get the Thor from around 800 ad, the Thor he first met. He brought him back to the future where he made him a slave, along with the other remaining gods. Gorr kept them alive so they would build his God Bomb he would use to exterminate the rest of them
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Gorr is made from the LOTR character Azog with some Magic Sculp White adds.