The moment the soul of Moebius stands up in the spectral world after Kain kills him. Just the slow turn of the camera to reveal that Moebius is standing in front of Raziel. You instantly know what's about to happen. It also shows again that while Kain and Raziel are lethal on their own, together they are completely devastating to whoever or whatever is in front of them. Makes me wish we got to see the era during the Empire's beginning. Even if nothing important to the story happens. I just want to see how Kain and Raziel interact with each other and everyone else.