Time was, if you took the corrupted ashbringer to Scarlet Monastery, all the scarlet crusaders would turn friendly to you, and a scourged NPC near the end (high inquisitor fairbanks) would inform you that you could travel to outland to have the blade cleansed... but Blizzard never went anywhere with that.
It was likely a "famous" weapon because it never had any clear source, and people were allowed to come up with all these crazy rumors on how to obtain it... just like the mysterious unhatched egg.
“Do not lose time on daily trivialities. Do not dwell on petty detail. For all of these things melt away and drift apart within the obscure traffic of time. Live well and live broadly. You are alive and living now. Now is the envy of all of the dead.” ~ Emily III, World of Tomorrow
According to Lana'thel, both Quel'Serrar and Quel'Delar were forged by the dragonflights and given to the Night Elves and High Elves, respectively.
How noble of you - to blindly kill without question, to come for my head on the barest word of another. Sheathe your fury and hear my tale first. You'll see what noble ignorance has done to these lands.
Hehe i remember losing some hours of sleep due to reading about it here on mmo champ and wow wiki, I realy enjoy that kind of stuff.
Tin foil hat kind of style, speculation and people discussing lore into a heated discussion.
Ah yes, Ashbringer. One of the most lore-rich weapons in the World of Warcraft. I remember my friend from Vanilla who had a human warrior who was obsessed with the sword, or finding it anyway. Of course he never did but he use to theory-craft with myself and other about how the sword would be obtained. Even though I had only a mage at the time I was still intrigued by the blade.
I think what was most alluring about the blade itself was the mystery surrounding the blade. The little in-game hints and references that drove players crazy.
"Enjoy your power"