Those pallid, constantly-grasping hands in the pits. Should Richter be unlucky enough to fall/get knocked into them, they grab him and drag him down, their perpetual moaning becoming... something else — and a few seconds later, Richter dies horribly. Since those damn demon hands dragged him offscreen, how is left to the imagination.
Dracula's third form, which is exclusive only to this version of the game and can only be fought if you saved Annette. After you beat the tar out of his second form and he changes back to normal, he gets back up and teleports himself and you to what can best be described as a hellish river of souls flowing towards some sort of organ, with debris from the throne room and clock tower floating nearby. Then in some twisted mockery of a seraph, he turns his cape into six wings made of blood, then makes it literally rain blood before assaulting you with a large arsenal of new attacks.
The giant three-eyed skull in stage 3' (pictured above). Sure, it's mitigated somewhat if one has the Axe subweapon before coming across this enemy, making that intro seem a little unwarranted, but still.
