I am not Nihilus, just a True Sith Lord. The True Sith knew the technique, and according to Kreia, their draining power equaled and surpassed Nihilus'. Revan stands no chance. That's what I was hoping for when Krayt said Nihilus transferred his consciousness to his armor; the only piece of 'armor' we could call such is his mask, as he wears robes, not armor. And of course the energy cloud that resulted in his body dissipating was suspicious. No other Sith has faded like that.