Continuity mistake: When Dracula is talking to Victor and he says "It must now serve my purpose." you can see hair hanging over Victor's forehead. When it cuts to Victor getting up while saying "What purpose?" the hair is gone from his forehead. (00:02:30)
Continuity mistake: In the scene at the beginning of the movie where Dracula is at Dr. Frankenstein's castle, he says "over God." He then turns around with his arms at his sides and speaks to Dr. Frankenstein, with his arms remaining at his sides. When the shot changes to show Dracula's back and Dr. Frankenstein's front, we can see Dracula's fingers near his chest as if he pressed his hands together. There couldn't have been time between shots to change them from his sides to his front. (00:02:30)
Continuity mistake: When Anna picks the sickle up from the ground she is standing in sunlight. When it cuts to a wide shot she is standing in the shade at least ten feet from the sunlight. (00:27:15)
Continuity mistake: When Anna tells the citizens to kill Van Helsing and Carl, the undertaker gasps and moves backwards behind Carl. When it cuts, the undertaker has slightly moved to the side of Carl instead. (00:24:35)
Continuity mistake: When Anna tries to hit Verona, she grabs Anna's hand by the wrist. It cuts to Verona saying "I can feel fresh blood.", while holding Anna further up by Anna's fist. It cuts again and she is holding by the wrist again. (00:31:30)
Continuity mistake: At the very end, when the werewolf leans over the dead girl before picking her up, her eyes are open, but when he turns around with her and faces the camera, her eyes are closed. The werewolf could not have closed her eyes with his paws and claws nor with his arms full with the girl. (01:52:55)
Factual error: In the scene where Anna is carried in the air with the city of Budapest appearing in the background, there are two columns in the top right corner which haven't been edited out even though they are chimneys of factories built in the 1950's.
Continuity mistake: When they enter Anna's living room Van Helsing asks "Where do I find Dracula", and you can see him taking off both his gloves. In the next shot you can see he has his left glove back on. (00:36:55)
Other mistake: Van Helsing's ring fits his as a human, but in the climactic fight he turns to werewolf form and back and is still wearing it. He didn't have time to take it off and put it back on, so either one of his wolf fingers should be horribly, painfully cramped or the ring should have broken. No one insinuates that the ring has magical powers of any kind to prevent this.
Other mistake: When Victor draws the sword pointing it at Dracula, after he says "Stay back," in the frontal shot of Victor holding the sword the tip of the sword is bent. (00:03:25)
Continuity mistake: When Dr. Frankenstein turns around and suddenly faces Dracula he is scared and bumps backwards on to a rack. At that time you see him standing a bit to the right of the rack's pole. When it cuts he is standing a bit to the left of the pole. (00:01:25)
Continuity mistake: As the first vampire charge and Van Helsing pulls up his weapon you see Anna bending down beside the well. It the cuts to a shot from above where the three vampires come flying against the camera. At that point you can see the well and Anna isn't standing anywhere near it. When it cuts to Anna shouting "Everybody inside." she is standing beside the well again. (00:24:50)
Continuity mistake: In the beginning after Dr.Frankenstein has awakened his monster he turns around and runs against the window. As he runs you can see a rack of a kind standing in front of the window. When it cuts the rack is gone. (00:00:55)
Continuity mistake: When Velkan shouts "Anna, hurry. Hurry.", while Anna is looking for Velkan's gun, you can see a man behind Anna aiming with his rifle. When it cuts suddenly two other men has appeared aiming with their rifles. (00:21:20)
Continuity mistake: When Anna is trying to free her brother from the gurney, the leather strap around his neck disappears and reappears from shot to shot. (01:00:55)
Revealing mistake: When the windmill starts to burn, we see a closeup of the Bible, before fire flares up in front of it. But if you look close, the angle of the fire is not correct in relation to the angle of the camera. Obviously the foreground fire was imposed over the scene later on. (00:05:35)
Continuity mistake: When Dracula says to Victor "Pity your moment of triumph is being spoiled," you can see Dracula standing with his back against Victor and slightly turning around. When it cuts Dracula is facing Victor even thought he still should be turning around. (00:01:30)
Continuity mistake: When Anna falls on the roof she begins to slide down, leaving slide marks on the snow. When the bride come flying we can't see any trace of marks on the roof. The roof is perfectly covered with snow. (00:28:15)
Continuity mistake: When Anna and Van Helsing are talking and Anna says "Who will kill him if not me? Who will show courage if not me?", she has her hands to her hips. When it cuts she holds her hands down. (00:37:45)
Revealing mistake: When it shows one of Dracula's brides drinking a glass of blood, close-up shots reveal it's actually tomato juice, shown by traces on the glass itself. (00:30:35)
Answer: After being killed - "murdered" as Dracula stated several times - by Van Helsing, Dracula made a deal with the Devil to regain his life. Carl tells his story when telling Van Helsing and Anna everything that he has learnt.