Fics like The Force of Nature.

The scales call for balance. And they get it. Always. Hadrian Potter finds himself the answer to problems far beyond his perception. Even if they can be rationalized in such a way that it eases conscience, he already knows his answer, deep in his heart he knows. He knows. And that is why he agrees to Death's amazing, crazy proposition. Besides, how hard can reincarnation to some far, distant, unknown dimension's planet be? Perhaps he will finally find his own answers.

You may also like

Parallax by KateAndCat (Avatar (Cameron Movies))
He's Death's Master by luna_mara (Harry Potter - J. K. Rowling, Kuroshitsuji | Black Butler)
1942 by TheHolyGay (Harry Potter - J. K. Rowling)
You can't get to him, let me tell you that by Lerya (Harry Potter - J. K. Rowling, Fullmetal Alchemist: Brotherhood & Manga)
Master of Death and Magic's chosen by Lerya (Harry Potter - J. K. Rowling)
Good Children Stay At Home by KriemhildeInTheCastle (Avatar (Cameron Movies))
The Skyline Falls by dabiforlife (Avatar (Cameron Movies))
Children of Eywa by Sparkbreaker (Avatar (Cameron Movies))
The Things Death Keeps by Papichongo36 (Harry Potter - J. K. Rowling)
The Innkeeper by Lerya (Harry Potter - J. K. Rowling)
A red drop in the abyss by hannah_mara5 (Avatar (Cameron Movies))
The Wastes of August by Lomonaaeren (Harry Potter - J. K. Rowling)
Death and Time Travel. Neither of Which Harry Asked For, Thank You Very Much. by nlpiersee (Harry Potter - J. K. Rowling)
Flower on the Rise by grandgreengrapes (Avatar (Cameron Movies))
Feral by Proudmonsterlover (Avatar (Cameron Movies))
The Golden Bird's Cry by Lomonaaeren (Harry Potter - J. K. Rowling)
I’m Tired and Angry (But Somebody Should Be) by SweetSummerSins (Harry Potter - J. K. Rowling, The Dragel's Song | Neilson Hewitt Series - Chera Carmichael)
Let's Just Leave by SnapeIsMySpiritQuill (Harry Potter - J. K. Rowling)
Kiantu by Jude_Baulding (Avatar (Cameron Movies))
A son for a son right? by ilovefandoms (Avatar (Cameron Movies))