Arthas, prince of Lordaeron, was turned from a young paladin to the "dark side" and became a Death Knight by the power of the runeblade "Frostmourne" which he was tricked into obtaining by the Lich King.
Here shows his homecoming after defeating The Scourge undead armies in Northrend; but he has his own agenda....
As Thrall continues to rally the Horde and Tauren in Kalimdor, Arthas and Kel'Thuzad summon Archimonde to Lordearon.
This powerful demon is an Overlord of the Burning Legion and uses his powerful magic to destroy Dalaran, city of the Kirin Tor. This is a step closer for the undead Scourge and Burning Legion to conquer all of Azeroth.
At the Battle of Mount Hyjal, Archimonde finally reaches his goal and begins to destroy the World Tree. The combined might of the Night Elves, Humans and Orcs succeeded in only delaying his approach. However, that is all they needed to do to give time for the druid Malfurion to awaken the wisps to defend the homeland!
![Warcraft Lore 4: Arthas\](http://img.youtube.com/vi/bMrCSqSwAxg/2.jpg "Warcraft Lore 4: Arthas\")
