[Harry Potter fanfic + System + a golden finger from the cultivation world + one (no) female lead + characters stay true to the original + decisive and ruthless + steadily growing stronger]
On his eleventh birthday, a mysterious ring left behind by his parents suddenly pulls Ye Fan into a magical world. Hearing the prompt that the cultivation System has bound itself to him, followed by quests related to Hogwarts, Ye Fan realizes that Hogwarts is about to get very strange.
“Ye Fan, don’t recite ‘demons and ghosts, begone’ to the ghosts!”
“Oh, dear Ye Fan, could your teacher have a taste of that thing in the cauldron called hot pot?”
“Expelliarmus! Haha, Ye Fan, now that you’ve lost your wand... wait, what the heck is that sword?!”