Singular einherji, plural einherjar. They are no zombies. Some pitiful mix-ups with some invented heaven after death occurred. Valhöll is for the living pure men
(note: men implies men and women).
The scientific “Maharishi Effect” explains the term “waging peace in consciousness”: When we nýsum niður (transcend thought and space-time) we contact Being, and this bliss is scientifically measurable in our brain-functioning.
In time, by nýsa niður regularly, we become pure. Enlightened. We purify the whole world of men with this pure bliss of Being.
We can term this purifying power as fimbulrúnir.