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|Appears in||Call of Duty: WWII|
Klaus Fischer (formerly)
Heinz Richter (formerly)
|Level||The Final Reich|
- "A brilliant doctor who rose through the ranks of the Nazi party due to his creative and merciless dedication to making the German army an unstoppable power."
- — Description
During World War II, Doctor Straub was contacted by the Führer, who requested him and his staff to create a type of soldier that does not rest, fear or shy away from the shadow of death.
While this happened, Klaus Fischer, an inspiring scientist, informed the Ahnenerbe of the discovery of the hilt of the legendary sword that once belonged to holy Emperor Frederick Barbarossa within the mining town of Mittelburg in the Divine Providence. When the Ahnenerbe was unable to remove the hilt from its resting place, they requested Straub and his men, along with Heinz Richter, to come to the town to investigate, discovering the hilt is protected by a magnetic force. Upon arriving, he immediately had the entire town put on lockdown.
Despite the hilt being protected by the mysterious magnetic force, Straub and his men were able to siphon vast amounts of energy from the hilt. During an early experiment to draw power from the hilt, a cable overheated and snapped, striking two guards and instantly killing them. However, they soon began to violently twitch and reanimate before getting up and walking towards Straub with the intention of killing him. However, more guards arrived and put the two down. With this incident, Straub soon discovered the key to completing his task, as well as a vision of the Führer's future.
Dubbing the new form of energy obtained from the hilt 'Geistkraft', he discovered that it can be conducted through the human nervous system, which activates the most primitive parts of the human cerebellum. This energy is what 'preserves' the undead, as well as drive them. Straub also discovers that by triggering the pain receptors of the corpses, he can augment the zombie's strength and speed.
While this happened, Klaus attempted to prove himself to Straub by presenting his earlier works with his old mentor Lenard to him, only to be met with imprudence from Straub, who claims his works were "poorly documented" and "amateur". Straub also talked of Klaus' and Marie's father, Heinz, and ridiculed him for his shift from weapon design to toy making. Straub would also later to begin having conflicts with Richter after the latter discovered the possibilites of various weapon designs with the use of the Geistkraft energy. During this time of conflict, Klaus, now aware of Straub's true intentions and is ever growing conflict with Richter, found this opportunity to sabotage Straub's work.