<P> Later, hearing of a vast host of Goblins on the move, Beorn arrived at the Lonely Mountain in time to strike the decisive blow in the Battle of Five Armies . In his bear form he slew the Goblin leader, Bolg and his bodyguards . Without direction, the Goblin army scattered and were easy pickings for the other armies of Men, Elves, Dwarves, and Eagles . Beorn often left his home during the narrative of The Hobbit for hours or days at a time, for purposes not completely explained . </P> <P> Later in the Hobbit, it is said that "Beorn indeed became a great chief afterwards in those regions and ruled a wide land between the mountains and the wood; and it is said that for many generations the men of his line had the power of taking bear's shape, and some were grim men and bad, but most were in heart like Beorn, if less in size and strength ." (The Hobbit Chapter 18 The Return Journey). It appears the ability to change shape into a bear was not exclusive to Beorn as an individual and may, in fact, have been an ability of a small sub-set within the race of Men . </P> <P> In the years between the Battle of Five Armies and the War of the Ring, possibly spurred by his interaction with Thorin's company, Beorn emerged from his reclusion, and rose to become a leader of the woodmen living between the Anduin river and the fringes of Mirkwood . As stated by Glóin in The Fellowship of the Ring, the Beornings also "keep open the High Pass and the Ford of Carrock ." </P> <P> Some time before the War of the Ring itself began, Beorn was succeeded by his son Grimbeorn the Old . His death is not included in the chronologies in The Return of the King's appendices . </P>

Who plays the goblin king in the hobbit movie