If you're looking for manga similar to Fate/Grand Order -Divine Realm of the Round Table: Camelot- Wandering; Agateram, you might like these titles.
2013: The 3rd Honkai War started in eastern Nagazora. 3 young girls survived the incident. After being rescued by the Schicksal Far East Branch, these girls were found to hold immense powers that may very well help the human race survive the Honkai onslaught. This is their story.
Anti-Entropy struck Schicksal again by acquiring an item of interest from a defector. While the girls celebrated Major Himeko's recovery from her Honkai condition, class monitor Fu Hua received a special mission assignment from the Overseer himself.
The Silver Wolf of the Urals was sent on a suicide mission to assassinate the Demoness of Siberia. Little did the Wolf know that this would change her life forever.
The year is 2016, and glitches found in humanity's past threaten the sustainability of its future. The Chaldea Security Organization-tasked with preserving human history for as long and as strongly as possible-has developed a new method of time travel to repair these events, stabilizing humanity's future. But when an unknown threat pushes mankind to the brink of extinction, young recruits Mash Kyrielight and Ritsuka Fujimaru find themselves at the helm of the rescue mission: Obtain the Holy Grail in a face off against fate itself…
"Humanity will be extinct by the year 2017." This prophecy was was observed by Chaldea, an organization that guarantees humanity's continued survival. Through its magic, it saw humanity's hope and future end in that year. To prevent this event from occurring, Chaldea sends its agents back in time to 2004, to Fuyuki City in Japan, the place from which humanity's end supposedly stems from. What awaits them there?