Harry Potter: Return to the Wizarding World

A Harry Potter sequel

[Single heroine + no System + expanded worldbuilding + new plot + coming-of-age story + alters some of the plot of Harry Potter and the Cursed Child + changes to some of the setting]

The sole heroine and plot are both original, and you can absolutely trust the characters. Their portrayals have been adjusted slightly.

The Grim Reaper, who has existed for a thousand years, descends upon the mortal world once more in pursuit of power greater than his original strength.

Guided by nature, Zeyu competes with him for the Deathly Hallows and thwarts his schemes.

Wait, Voldemort is one of the Grim Reaper's servants?

Grindelwald is one of his servants too?

And what about our side? We're all gods!