1, technical talent is different
Arthas is a death knight and belongs to the power type. Illidan, on the other hand, is agile and not dominant.
2. Alsace has home court advantage.
The battle place is Northrend, the Lich King's lair, the most powerful place. Arthas got help from the Scourge Corps, and reached the Crown Glacier of Ice first, and got a breathing space. Illidan, on the other hand, came from outland, exhausted. Although Illidan had Gourdain's skull, Nero Zu was Gourdain's master, so Illidan finally lost.
3, the version of the plot needs
Arthas is the protagonist of the wrath of the Lich King, and Illidan's era is the second coming of the legion. In the final duel, Illidan gained the upper hand, but Illidan had one of his biggest faults: arrogance. After he knocked down Arthas, he flew up and boasted about his weapons and strength. Arthas got up and gave Illidan a sword while Illidan was distracted.
Illidan fought Arthas, and Illidan dealt a heavy blow to Arthas. He flew into the air to mock Arthas and prepared to burn Arthas completely with evil energy. When he was proud, Arthas, who had gained all the power of the Lich King and was blessed by the artifact Frostmourne, jumped up and hit him and cut him.
Arthas' Character Setting
Arthas is the most tragic hero in the series of Warcraft. He was originally the prince of the kingdom of Lordaeron and a brave and selfless paladin of the Knights of silver hand.
Later, he was bewitched by the Lich King to defend his homeland. Because of disagreement and hostility with his mentor and lover, he took up the cursed weapon Frostmourne, an ancient magic sword that could devour other people's souls.
Arthas gained strength from it, but became a death knight who believed in darkness. After that, he killed his father and seized the throne, turning the whole kingdom of Lordaeron into a hell on earth. Finally, he set foot on the frozen throne and joined the Lich King to form a new Lich King.