So AFAIK there has not been a mod or website created for editing of the Chronicle since RotW. It is theoretically possible to do for SP because we know the Chronicle uses the ModernSharedStashSoftCoreV2 d2i file (HardCore for hc ofc). Shared stashes were "cracked" shortly before RotW came out, but they haven't been looked at much since the dlc released and aren't currently editable. Could be wrong here.
There's a quick and dirty way to jank-fix the chronicle though, but it is a double edged sword - obtaining a new, completed chronicle from someone else's shared stash file. That would do exactly what you think it would do but would also overwrite your shared stash. This is the only way I know of to mess with the chronicle at this time without someone figuring out the file's inner workings again. Then, you could just make a personal rule to not use the cosmetics until you you find all the missing items from your list "again." Or not, you do you. I'm not your mother.
I have not tried this, mind you, but I would estimate a 95% chance of success for SP only. Cannot give any guarantees.
If you do decide to try the above (which I honestly would not recommend), backup your shared stash file and clean out your shared before making the swap. You have been warned.
Thank you sr. Awesome response
Have you already found any of the really rare items?
If not, chances are you could as well start from scratch and time to finish will be the same.
I though so.
Items missing are:
Tyraels
Cham
Zod
Cow king hooves
Bane Ash
Kneel Striker
(and all the new ones)
I do believe there are mods which will force set & unique drops. Tedious and not the immediate result you are probably looking for, but doable.
I'd probably just stick it out until I mentally check off everything and then resort to a mod.
Ty sr thats another way to do so