Kael'thas and Arthas

Under the command of Kael'thas, the remaining thousands of high elves of Silvermoon could barely hold on for a while when fighting Julia and Benia. But when Arthas and Kel'Thuzad joined the battle, this final straw fell onto the camel's back…

Although he didn't have any Scourge under his command, Arthas had powerful undead magic power. As he waved Frostmourne, the corpses in Silvermoon immediately stood up again. There was no lack of corpses with rotten intestines and missing limbs. When the corpses of these high elves turned into undead and attacked their former people under Arthas's control, the survivors of Silvermoon, including Kael'thas, instantly collapsed.