purplerain I suppose, but given the fact he never displayed it when there were instances it would've benefited him, and his use of Essence Transfer i'm inclined to believe he was lying when he said he'd learned it. Not saying you're wrong, just saying that's how I see it. And i'm saying that because Palpatine can't overcome it he couldn't. I didn't say the abilities themselves were similar, but the people and situations one would face battling them. In short, godlikeabilities that can't be overcome in a conventional way. The abilities are similar in that all three are kept from death in various ways. Plagueis heals himself. Nihilus has bound his essence to his armor. And Sion's body and soul are bound together by the Force. And Nihilus was killed by the Exile after being weakened by both her and Visas link to him, this dampened his connection to the Force. Since the ability is completely dependent on the Force, of course weakening the connection would weaken the ability. At its max however, the ability can't be overcome. Considering that Venamis was dead, and Plageuis brought him back to life, I doubt just stabbing him in the heart would work as long as he was aware when it was happening. And i'm not saying any of them are invincible. I'm saying they can't be killed through normal means. Cade's ability isn't the same as Plagueis. There's an actual limit to it. However, it is still a godlike healing skill that can be used on the fly. I'm not saying he's not the most powerful sith lord. I'm not saying he'd lose. At no point have I stated either of those things. I'm saying that he quite simply wouldn't be able to kill Plagueis. The same way that no person could possibly kill Sion unless they severed his connection to the Force, or talked him into dying. No matter how powerful they were, it could be Vader, it could be Jacen Solo, it could be freaking Yoda, if they don't have a particular ability, Sion's not dying. And I see Plagueis and Nihilus in the same light.