Miss_Murr | Points

My boyfriend and I are trying to find this movie he remembers vividly from one scene where a guy who claims he's God tries to convince some people in a room that he is God and is trying to save their children....

It's a old movie which plays in the middle-age. I only remember a scene from the end, where the protagonist fights with a monster from a cave and there's lava ore fire. I think the monster looked like...