The Keep [4K UHD] Fandango

When soldiers under the command of Captain Woermann begin to die horribly, he receives the unwanted assistance of Nazi Major Kampffer, who assumes command and forcibly enlists the aid of the local expert on ancient languages, the Jewish Doctor Theodore Cuza, in the translation of the cryptic writings left near a murdered soldier's body. When Cuza comes face-to-face with the Keep's ancient resident, he forms a pact with the creature in the hope that it will escape and destroy Hitler's armies.