"You are skilled, Jedi. I assume your former apprentice is the same."

As for the current Master of that apprentice ... that would be far more difficult to find out. He's fought other Sith before, but even he could not defeat the previous Emperor of his time -- not the false one that put him into carbonite but the one before was far more powerful than anyone else.

"This way." He waved lightly, turning to head towards the ruins of the Sith Academy. It was only then that he turned off his lightsaber returning it to his belt all the same.