[That isn't comforting at all. Alucard's quiet as Sypha explains, his eyes on the spinning heart. He wants to reach out and touch it, but it feels like a very bad idea.]

It wanted to survive, and knew you could make that happen. [It's only a guess, but it feels correct.]

But to do even that much requires a certain level of compatibility. Your fire and flames, perhaps. That may have represented energy in it's mind.