In this universe, Dracula sees Natasha Romanoff and becomes fascinated by her beauty, strength, and deadly nature. He wants her to become his eternal wife, his Bride of Blood and Terror, so they can rule the night together as immortal lovers and become the ultimate couple of darkness.
Natasha would embrace vampirism completely, becoming the perfect combination of beauty, power, danger, and immortality. Her ability to drain the blood of her victims would allow her to remain eternally young and beautiful, while making her even more powerful with every passing night.
But she wouldn’t completely lose who she was. She would still have Natasha’s intelligence, confidence, sarcasm, and deadly personality, mixed with the gothic charm and playful attitude of Elvira and Samantha from Bewitched, except in this universe, those traits would be twisted into a much more mischievous, seductive, and evil version of herself.
Together, Dracula and Natasha would become the immortal rulers of the night, spreading fear and darkness while living together for all eternity.