Oh he remembered. He just wanted to hear the Jedi say it again. The suffering of a far light-sided person made this ... partnership or whatever it was far more tolerable.

That and he might find it somewhat amusing.

"At the Sith tomb in Korriban there was once a regular human who locked himself away inside because he believed he was actually a Sith lord. I'm told he gathered quite the following of others who equally fell to insanity."

Malgus made a few turns to the area where roughly the Sith Council chamber used to be. Larger than the Jedi's council room it was still similar, though one main difference was a throne straight ahead from the door.