The new Lich King (Jailer of the damned)??

Bolvar at the Battle of Angrathar at Wrathgate

Highlord Bolvar Fordragon was a venerated warrior of the Alliance and served as the Regent of Stormwind following the disappearance of King Varian Wrynn. Upon Varian's return, Bolvar was named the commander of the Alliance forces sent to take the battle to the Scourge in Northrend. After the treachery of Grand Apothecary Putress at the Battle of Angrathar the Wrathgate, Fordragon was believed to have been killed, either by the Forsaken Blight or the fires of the red dragonflight.

However, Fordragon survived, his body altered by the dragons' flame, and was taken by the Scourge into Icecrown Citadel, tortured by the Lich King in an attempt to break him to his will. However, the noble spirit of Fordragon resisted the Lich King's deprevations. After the death of Arthas Menethil, the mortal host of the Lich King, Fordragon demanded that Tirion Fordring place the Helm of Domination, containing all of the powers of the Scourge, on his head, so that he would forever be the jailer of the damned - imprisoning the Lich King within the Frozen Throne once more and containing the threat of the Scourge.

oh man! I really love this word! feel so heroic!

"Tell them only that the Lich King is dead. And that Bolvar Fordragon... died with him."

—Bolvar Fordragon to Tirion Fordring, after being crowned the new Lich King.

The jailer of the damned - To maintain control of the scourge from being chaos and sealed the Lich King in the frozen throne forever...