I am looking for the Sterek story where Stiles knew that Derek was his mate at eight years old. He and Derek were friends even though Derek was older. Jackson is also Stiles' brother in this and later Jackson has a pairing with Isaac. Scott dies in this because of his faith in the Argent family and Allison. Derek has a permanent injury due to the war. This story also has MPREG.
I think you mean this deleted fic by fatebegins. You can read it on the wayback or I think there is a copy in the dropbox.
Someday Came Today by Fatebegins | 81.5K
“March 2, 1810… Today, I met the man I’m going to marry.”
At the age of eight, Genim “Stiles” Stilinski showed no signs of Great Beauty. And even at eight, Stiles learned to accept the expectations society held for him–until the evening when Derek Hale, the handsome and dashing Alpha of the Hale pack, solemnly kissed his hand and promised him that one day he would grow into himself, that one day he would be as beautiful as he already was smart. And even at eight, Stiles knew he would love him forever.
