The Titan of Time and his final goodbye

READ THIS ITS IMPORTANT TO THE STORY!!!
Although this is kinda half set in a medieval setting there are still parts in it from today's world like TV's or...guns. Don't judge ok? My writing my rules

Follow one of the last remaining Time mages, Juno in his search for the 'Chrononomicon II' that his grandfather made. Meet elf's and bandits and conmen and himself from different times...? Uncover secrets lost to time, bond with the only Elf who takes him seriously and watch him collapse any time he casts a damn spell