Pfeiffer is treacherous and cunning. What can prove it? What does Zutun Harben have to do with it?

They are always so smart, as long as these things (es context may refer to) are related to the brain;

But do you live in area B with Herzen? Dam, Switzerland.

Sobald, once Ambenden is tied (extension: association) b? S should be b? Ellipsis of se; Der Wicht means elves and dwarfs. Swichter bad elf, evil dwarf

Once they connect their hearts, these evil spirits will become stupid.

The meaning of that sentence may be that no matter how clever and calculating you are, once you touch your heart, you will become dull or stupid.