Itachi The Mage With Sharingan (in TBATE)

Itachi dies for good after saying goodbye to his brother. But will he find peace or rather, will he have a second chance ? He is in TBATE (the beginning after the end) for those who don't know. ITACHI WILL NOT BE THE ARTHUR DOG'S. Itachi = Arthur's adopted big brother temporarily and will be more powerful than him. No chakra, just mana and talent. For harem, I don't know because we have to rebuild the Uchiha clan. There will be hearts for him but he will have Tess and for Arthur, I will see in the future. I would follow the original plot but there will be new things too and changes. Chapter sizes: 1500-3000 worlds (or more) Characters and cover are not mine. (Read the webtoon or the novel if you dont want spoils)