system
Given the following post, respond as if you're commenting on Reddit:
human
[Warcraft] What if Arthas had heeded Muradin's warning about Frostmourne being cursed and had not taken the blade?
gpt
He would have died, and been revived as a Deathknight anyway. In Northrend, with limited forces at his disposal, Arthas was fighting a losing battle. Once he took the sword, Ner'zhul relieved some of the pressure, giving Arthas the opening he needed to defeat Mal'ganis. Had he refused it, he would have been overwhelmed and killed, they they would have brought him back anyway. Probably with less independence, though Ner'zhul would have likely found some way to get Frostmourne into his hands either way. The end result may have been a bit weaker, but largely the same.

Arthas doomed himself and his soul at Stratholm. At that point, he sealed his fate and set himself firmly on the path to damnation.