There are actually quite a few of these themes involving Nazis occult methods or searching for mythological objects or objects that are associated with the occult in order to find ways where they had an advantage during WW2.

Most of Indiana Jones's films involve the Nazis as the main antagonists who are looking for mythological objects to that grant them more power against their enemies such as the Lost Ark, the Holy Grail and so on. A few video games involve this theme such as the Nazi zombies storyline in Call of Duty or Nazi Zombies in the Sniper Elite series, or in some of the Wolfenstein games. There is even a famous book called "The Spear" whose main plot is about a Neo-Nazi cult searching for the Spear of Destiny which had mystical powers.

There is a certain feeling behind this theme that the Nazis were obsessed to the point of lunacy or unethical means that they were willing to go all out and do whatever acts that deemed as necessary to be one step further than their opponents during WW2.

So how close to reality is this theme? Did the Nazis really make plans to collect these so-called "artifacts" or made military plans for unethical experiments or "mad science" experiments in order to have an advantage in WW2?