Welcome back! This week we're mostly tilted toward Scourge questions, whereas just a few of weeks ago we were all dragons, all the time. Things just happen that way, I don't plan it! Really! Anyway, let's get this party started.
Does anyone actually know that Arthas merged with Ner'zhul? Any NPCs that is. Because there was no one besides those of the Legion like the Dreadlords and Kil'jadean who knew that the original Lich King was armor on a pedestal, everyone else like Thrall, Jaina, Rhonin, Bolvar, Wrynn, just know that Arthas was the one who marched to Icecrown and came back only to spread the plague and kill his father. No one but the player actually saw him walk up Icecrown Citadel and shatter Ner'zhul's prison.