Not Steel But Leaded Iron

Fallada:

The two males didn’t die! They jumped to the bodies of the soldiers who shot them and transformed the soldiers’ bodies into their own likenesses. That’s the difference between them and their victims: their victims can’t leave their bodies; only the original three can do that. But I’ve killed one of them.

Caine:

One of which?

Fallada:

One of the two male vampires. One of the transformed ones.

Carlsen:

How did you kill him, Fallada? How?

Fallada:

The old way, Carlsen: a leaded metal shaft penetrating not through the heart but through the energy center two inches below the heart. Not steel but leaded iron.

— “Lifeforce” (1985)