Magnus of Norway, England, Denmark and Sweden, Master of the North Sea and overlord of the British Isles, whom was bestowed posthumously with the epithet "The Great" is the son of famous conqueror Harold Hardrada, the famed "Last Viking" whom unified England and Norway during the "War of Three Kings" that followed the death of Edward the Confessor. Magnus', whom had ruled Norway in his father's name during the war, was brought to England in 1067, afterwards which he was tasked with bringing order to England following his father's return to Norway. It is in these early years as regent that Magnus cemented his reputation as a just but firm ruler, as he would marry Harold Godwin son's eldest daughter Gunhild, uniting the house of Yngling and Godwinson into one. In a cruel twist of fate, Magnus would chase his new in-laws out of England, claiming all the estates that had once belonged to the Godwinson, minus Northumbria, which he would grant to his brother Olaf in exchange for his recognition as sole heir to the Kingdoms of Norway and Denmark.
The death of his father in Trondheim would see Magnus travel to England to secure the crown, where he punished a plot by various Norwegian jarls which plotted to blackmail his brother Olaf into claiming the Norwegian crown - his return to England shortly following that would be to defeat various Anglo-Saxon rebellions, which he would achieve in short order. A great centralizer, Magnus ruled as a true medieval Autocrat, something unheard of in those times. The royal estates were vast, providing great amounts of coin to fill the royal coffers, which allowed Magnus to bribe the papacy as recognizing as suzerain of the various bisphorics of Scandinavia and the British Isles.
A conflict with the Estridsens would evolve into another war which would serve to shape the face of the Kingdom - the combined forces of England and Norway would conquer Denmark followed by a succession crisis in Sweden which would see Magnus elected to that throne as well. Following this, a great immigration of Scandinavians would start to England and the Norse holds in Scotland and Ireland, with Dublin becoming a major city of Magnus "North road", a great market of various trade routes in the north. Dublin would also spread his influence into Ireland, with many regions of the island falling to Magnus' sphere of influence..
From his wife, Gunhild of Wessex, Magnus would be the progetinor of a long line of Kings that would heavily shape the politics of the Kingdom. His eldest son, Olaf, would rule after his death.