A movie about a guy who became invulnerable to physical damage after swimming in a pond

A movie about a guy who became invulnerable to physical damage after swimming in a pond except for a place at his back where the water didn’t touch his skin

The idea of this is from Sigurd legend or "Siegfried Sage" in German. He was killing a dragon and bathing in its blood, but a falling lime leaf, left on his neck, isolated his skin from the blood. Did the movies look like medieval? https://en.wikipedia.org/wiki/Sigurd

Yeah, it is thank you

1 Answer

1

Lo chiamavano Jeeg Robot?