I am looking for a fantastic movie from the 70's, or 80's, maybe early 90's.
Various groups are sent on a search for an artifact; I think it was a sword. There is one scene I can remember quite clear: A group of riders is stopped by some kind of lizardmen coming out of the ground in front of them where they have been hiding in the middle of the path.
Another scene plays in some sort of cave with fog on the ground.