Dies Irae (2017)

At the end of World War II, sorcerers use the lives lost in battle as a ritual sacrifice in an attempt to resurrect a group of supermen whose coming would signify the world's end. Yet when the war finally ends, no one knows whether the ritual was a success. Decades pass, and it's all forgotten until present-day Japan when Ren Fuji has a disturbing dream of black-clothed knights.