Why is Dracula so powerful in Castlevania?

Why is Dracula so powerful in Castlevania? Originally a human called Mathias Cronqvist, Dracula fell into madness after the death of his first wife and became an immortal vampire thanks to the powers of the Crimson Stone. With his dark powers, he built an army of creatures and his fortress, Castlevania.

Originally a human called Mathias Cronqvist, Dracula fell into madness after the death of his first wife and became an immortal vampire thanks to the powers of the Crimson Stone. With his dark powers, he built an army of creatures and his fortress, Castlevania.