Fics like The House of the Black Ouroboros

When a pre-colonial magical codex resurfaces beneath the Yucatán Peninsula, Hermione Granger expects bad translations, illegal excavation, and the usual amount of Ministry nonsense. She does not expect Narcissa Black. Drawn into the same cursed ruin by a private expedition, Hermione and Narcissa uncover something far older and uglier than a single artefact: a bloodline curse rooted in the Black family’s burned branches, severed names, and generations of ritual denial. The family tree was never just a record. It was a weapon.

You may also like

Until the job is done by Ezteffellie (Harry Potter - J. K. Rowling, Slavic Mythology & Folklore)
A Thread Through Time by KCValeReads (Harry Potter - J. K. Rowling)
The Good War by inwardtransience (Harry Potter - J. K. Rowling)
Mending What Remains by Gabicarioca_S (Harry Potter - J. K. Rowling)
The Crescent by Aridichor (Harry Potter - J. K. Rowling)
Running on Air by eleventy7 (Harry Potter - J. K. Rowling)
By Blood and Obligations by Lunar_G_Messens (Harry Potter - J. K. Rowling)
90 Days to Wed by Yanana (Harry Potter - J. K. Rowling)
(Without drug or herb, or any witch's spell;) If you wish to be loved, love by PopulusTremula1219 (Harry Potter - J. K. Rowling)
A Wandless Weekend by BelladonnaInBloom (Harry Potter - J. K. Rowling)
Salt by Fluffy_Underneath (Harry Potter - J. K. Rowling)
The Restoration of The Black Legacy by Waxyne (Harry Potter - J. K. Rowling)
A Marriage Of Inconvenience by Hugo_falcon (Harry Potter - J. K. Rowling)
Anonymous by ssmbwrites (Harry Potter - J. K. Rowling)
A Reverence Most Indecent by ShippingSwanQueen (Harry Potter - J. K. Rowling)
Slices of a Life Worth Living by childhoodlight (Harry Potter - J. K. Rowling)
The Archeologist by Racke (Harry Potter - J. K. Rowling, Bloodborne (Video Game))
Killing Me Softly by Looktotheedges (Harry Potter - J. K. Rowling)
All the Young Dudes by MsKingBean89 (Harry Potter - J. K. Rowling)
The House of Black by Calliopeia419 (Harry Potter - J. K. Rowling)