Mirage Memorial is a mobile game by Efun.

Twenty thousand years have passed since the end of human history, and you are finally awakened, master! Over 100 beautiful servants who are reincarnated from the DNA of great figures in history have gathered together with courage and hope. Now, please lead your servants to re-open the Time Gate to crusade against Lucifer and save Mirage Memorial! In the meantime, your bond with the servants is officially formed...