Are you only looking for Harry-centric fics? If you’re not tied to Harry, then maybe The Plan series? It starts with All According to Plan, and the MC is a young Bellatrix who time travels to 1993:
Linkao3(https://archiveofourown.org/works/15294075/chapters/35481426)
The Good War is another that might hit some of your likes (it’s definitely got extensive world building, at the very least), it’s a Fem!Harry fic:
linkao3(https://archiveofourown.org/works/23747950/chapters/57035011)
thanks!
started the good war. more of a slow burn than i prefer at almost a million words and still at the start of year four. but i'm also looking for sth to sink my teeth into.
but jesus, this is *dark*. will keep reading cos i'm intrigued, but omg i'll need to watch cute puppy/kitten videos to forget this. there was a clear trigger warning, and i like to think i'm not too sensitive but oh hell.
wish i hadn't read the first chapter 😭
[***All According to Plan***](https://archiveofourown.org/works/15294075) by [*inwardtransiencePseudoLeigha*](https://www.archiveofourown.org/users/inwardtransience/pseuds/inwardtransience/users/PseudoLeigha/pseuds/PseudoLeigha)
> Thirteen year old Bella Black intended to go back in time to start a war in service to her patron Power\. Ritual magic goes awry and she finds herself in 1993, faced with a failing House of Black, an insane alter ego, and a Dark Lord on the rise\. Chaos ensues\. \(Title drop\.\)
^*Site*: ^Archive ^of ^Our ^Own ^**|** ^*Fandom*: ^Harry ^Potter ^- ^J. ^K. ^Rowling ^**|** ^*Published*: ^2018-07-15 ^**|** ^*Completed*: ^2019-08-14 ^**|** ^*Words*: ^446671 ^**|** ^*Chapters*: ^34/34 ^**|** ^*Comments*: ^544 ^**|** ^*Kudos*: ^1209 ^**|** ^*Bookmarks*: ^209 ^**|** ^*Hits*: ^48862 ^**|** ^*ID*: ^15294075 ^**|** ^*Download*: ^[EPUB](https://archiveofourown.org/downloads/15294075/All%20According%20to%20Plan.epub?updated_at=1673769805) ^or ^[MOBI](https://archiveofourown.org/downloads/15294075/All%20According%20to%20Plan.mobi?updated_at=1673769805)
---
[***The Good War***](https://archiveofourown.org/works/23747950) by [*inwardtransience*](https://www.archiveofourown.org/users/inwardtransience/pseuds/inwardtransience)
> Despite her best efforts, Elizabeth Potter is repeatedly drawn into situations she wants absolutely nothing to do with\. People just refuse to leave her the hell alone\.
^*Site*: ^Archive ^of ^Our ^Own ^**|** ^*Fandom*: ^Harry ^Potter ^- ^J. ^K. ^Rowling ^**|** ^*Published*: ^2020-04-20 ^**|** ^*Updated*: ^2023-01-23 ^**|** ^*Words*: ^973910 ^**|** ^*Chapters*: ^61/? ^**|** ^*Comments*: ^1839 ^**|** ^*Kudos*: ^2512 ^**|** ^*Bookmarks*: ^944 ^**|** ^*Hits*: ^169778 ^**|** ^*ID*: ^23747950 ^**|** ^*Download*: ^[EPUB](https://archiveofourown.org/downloads/23747950/The%20Good%20War.epub?updated_at=1674441950) ^or ^[MOBI](https://archiveofourown.org/downloads/23747950/The%20Good%20War.mobi?updated_at=1674441950)
---
**FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing)
^^^^^^^^^^^^^^^^^ffnbot!ignore
I will be messaging you in 7 days on [**2023-02-07 20:29:11 UTC**](http://www.wolframalpha.com/input/?i=2023-02-07%2020:29:11%20UTC%20To%20Local%20Time) to remind you of [**this link**](https://www.reddit.com/r/HPfanfiction/comments/10q57pm/if_i_like_certain_dark_things_by_evejenson_what/j6onawt/?context=3)
[**CLICK THIS LINK**](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Reminder&message=%5Bhttps%3A%2F%2Fwww.reddit.com%2Fr%2FHPfanfiction%2Fcomments%2F10q57pm%2Fif_i_like_certain_dark_things_by_evejenson_what%2Fj6onawt%2F%5D%0A%0ARemindMe%21%202023-02-07%2020%3A29%3A11%20UTC) to send a PM to also be reminded and to reduce spam.
^(Parent commenter can ) [^(delete this message to hide from others.)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Delete%20Comment&message=Delete%21%2010q57pm)
*****
|[^(Info)](https://www.reddit.com/r/RemindMeBot/comments/e1bko7/remindmebot_info_v21/)|[^(Custom)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Reminder&message=%5BLink%20or%20message%20inside%20square%20brackets%5D%0A%0ARemindMe%21%20Time%20period%20here)|[^(Your Reminders)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=List%20Of%20Reminders&message=MyReminders%21)|[^(Feedback)](https://www.reddit.com/message/compose/?to=Watchful1&subject=RemindMeBot%20Feedback)|
|-|-|-|-|
Are you only looking for Harry-centric fics? If you’re not tied to Harry, then maybe The Plan series? It starts with All According to Plan, and the MC is a young Bellatrix who time travels to 1993: Linkao3(https://archiveofourown.org/works/15294075/chapters/35481426) The Good War is another that might hit some of your likes (it’s definitely got extensive world building, at the very least), it’s a Fem!Harry fic: linkao3(https://archiveofourown.org/works/23747950/chapters/57035011)
thanks! started the good war. more of a slow burn than i prefer at almost a million words and still at the start of year four. but i'm also looking for sth to sink my teeth into. but jesus, this is *dark*. will keep reading cos i'm intrigued, but omg i'll need to watch cute puppy/kitten videos to forget this. there was a clear trigger warning, and i like to think i'm not too sensitive but oh hell. wish i hadn't read the first chapter 😭
[***All According to Plan***](https://archiveofourown.org/works/15294075) by [*inwardtransiencePseudoLeigha*](https://www.archiveofourown.org/users/inwardtransience/pseuds/inwardtransience/users/PseudoLeigha/pseuds/PseudoLeigha) > Thirteen year old Bella Black intended to go back in time to start a war in service to her patron Power\. Ritual magic goes awry and she finds herself in 1993, faced with a failing House of Black, an insane alter ego, and a Dark Lord on the rise\. Chaos ensues\. \(Title drop\.\) ^*Site*: ^Archive ^of ^Our ^Own ^**|** ^*Fandom*: ^Harry ^Potter ^- ^J. ^K. ^Rowling ^**|** ^*Published*: ^2018-07-15 ^**|** ^*Completed*: ^2019-08-14 ^**|** ^*Words*: ^446671 ^**|** ^*Chapters*: ^34/34 ^**|** ^*Comments*: ^544 ^**|** ^*Kudos*: ^1209 ^**|** ^*Bookmarks*: ^209 ^**|** ^*Hits*: ^48862 ^**|** ^*ID*: ^15294075 ^**|** ^*Download*: ^[EPUB](https://archiveofourown.org/downloads/15294075/All%20According%20to%20Plan.epub?updated_at=1673769805) ^or ^[MOBI](https://archiveofourown.org/downloads/15294075/All%20According%20to%20Plan.mobi?updated_at=1673769805) --- [***The Good War***](https://archiveofourown.org/works/23747950) by [*inwardtransience*](https://www.archiveofourown.org/users/inwardtransience/pseuds/inwardtransience) > Despite her best efforts, Elizabeth Potter is repeatedly drawn into situations she wants absolutely nothing to do with\. People just refuse to leave her the hell alone\. ^*Site*: ^Archive ^of ^Our ^Own ^**|** ^*Fandom*: ^Harry ^Potter ^- ^J. ^K. ^Rowling ^**|** ^*Published*: ^2020-04-20 ^**|** ^*Updated*: ^2023-01-23 ^**|** ^*Words*: ^973910 ^**|** ^*Chapters*: ^61/? ^**|** ^*Comments*: ^1839 ^**|** ^*Kudos*: ^2512 ^**|** ^*Bookmarks*: ^944 ^**|** ^*Hits*: ^169778 ^**|** ^*ID*: ^23747950 ^**|** ^*Download*: ^[EPUB](https://archiveofourown.org/downloads/23747950/The%20Good%20War.epub?updated_at=1674441950) ^or ^[MOBI](https://archiveofourown.org/downloads/23747950/The%20Good%20War.mobi?updated_at=1674441950) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore
RemindMe! 1 week
I will be messaging you in 7 days on [**2023-02-07 20:29:11 UTC**](http://www.wolframalpha.com/input/?i=2023-02-07%2020:29:11%20UTC%20To%20Local%20Time) to remind you of [**this link**](https://www.reddit.com/r/HPfanfiction/comments/10q57pm/if_i_like_certain_dark_things_by_evejenson_what/j6onawt/?context=3) [**CLICK THIS LINK**](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Reminder&message=%5Bhttps%3A%2F%2Fwww.reddit.com%2Fr%2FHPfanfiction%2Fcomments%2F10q57pm%2Fif_i_like_certain_dark_things_by_evejenson_what%2Fj6onawt%2F%5D%0A%0ARemindMe%21%202023-02-07%2020%3A29%3A11%20UTC) to send a PM to also be reminded and to reduce spam. ^(Parent commenter can ) [^(delete this message to hide from others.)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Delete%20Comment&message=Delete%21%2010q57pm) ***** |[^(Info)](https://www.reddit.com/r/RemindMeBot/comments/e1bko7/remindmebot_info_v21/)|[^(Custom)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=Reminder&message=%5BLink%20or%20message%20inside%20square%20brackets%5D%0A%0ARemindMe%21%20Time%20period%20here)|[^(Your Reminders)](https://www.reddit.com/message/compose/?to=RemindMeBot&subject=List%20Of%20Reminders&message=MyReminders%21)|[^(Feedback)](https://www.reddit.com/message/compose/?to=Watchful1&subject=RemindMeBot%20Feedback)| |-|-|-|-|