This show has officially lost its thread.
Speaking of losing their thread, Sloane's is rapidly unraveling. He places the case with The Sphere on top of the tomb and opens it. He removes The Sphere and carries it to a small stone dais in the middle of the room. "At last," he says, breathing heavily. "After almost thirty years." He's about to place The Sphere in what I assume is its official "spot" when Dead Nadia appears in a pale pink dress to ask her father if it's everything he imagined it would be. Sloane's all, Nadia! Baby! So glad you're here! If I didn't have someone to share this with, I would have doubted my own eyes. Also? Ooogedy-boogedy! And phhhhhffffththththt! La la la la LALALALA. Man's a nutter.
"You're talking to your dead daughter," quips Dead Nadia. "This is an odd time to question your sanity." Heh. She's one of those funny dead people. Sloane finally places The Sphere in its spot, and it lights up and starts spinning like an ancient disco ball. A red light that we can't see shines above it and illuminates Sloane's whack-ass crazy face. Before we can see what it is, we head outside, where Syd and Crew are approaching. They start shooting the shit out of the attending guards and all hell breaks lose. Syd makes a beeline for the chamber.
Then we see Sloane, standing before the dais, watching as a mini-Clifford spins above The Sphere. As it spins, it drips red liquid down onto The Sphere, which seems to collect it. What the liquid is, we don't know, but I'm going with Blood of Rambaldi. With this scene on pause, by the way, I can see that The Sphere is clearly housed between two stone pieces shaped like "<>". So, with The Sphere in place, it resembles the Rambaldi eye symbol. And I went back to Season Four and found this page from a recap where Sloane beats the crap out of some bald dude for being a dilettante and then he mentions immortality and...well, methinks we should have seen this one coming, y'all. Clearly, there are two Cliffords: one for turning people into a bunch of death-eating zombies and one for making you immortal. I guess. I don't know. I promised myself I wouldn't think too much during this finale!