The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat, Vol. 1 (manga)

The world's finest assassin has been reincarnated in another world. Hismission-to kill the Hero prophesized to save the world from disaster! With hisdeadly skills from his previous life and the magic he learns in this one, he'swell on his way to becoming the greatest assassin in all ofhistory...