To Change the Fate ( Fate : Grand Order x Male!Reader )

Summoned as a Servant means a Holy Grail War but not this time. A young mage from Chaldea has to stop the end of humanity by moving back in time and stopping catastrophies that suddenly occured in them. However, she can't do it alone and has to summon Servants in order to aid her in her quest of salvation. Unknown to her, her strong desire summoned a Servant who made significant mark on the history be it by legends or simple myths...