Vampire mirror twins
>Mirror twins are twins that are mirrors of each other
>The other is right-handed, the other is left-handed
>It's very rare, but possible, that the organs are also mirrored
>Imagine you have mirror twin vampires, who are usually killed with a stake through the heart
>But the heart is on the other side with one of them
That could be a twist. That two vampire antagonists are killed by the protagonist with a stake through the heart. But then later it is revealed that one survived. Or perhaps right away, then that "antagonist" bites protagonist or something.
>The other is right-handed, the other is left-handed
>It's very rare, but possible, that the organs are also mirrored
>Imagine you have mirror twin vampires, who are usually killed with a stake through the heart
>But the heart is on the other side with one of them
That could be a twist. That two vampire antagonists are killed by the protagonist with a stake through the heart. But then later it is revealed that one survived. Or perhaps right away, then that "antagonist" bites protagonist or something.