A Harry Potter/MCU Crossover in which Helena Iris Potter (Fem!Harry) is a reincarnation of Hela Odinsdottir. Naturally, things change.
Endgame Helena Potter/Hermione Granger
Features Reincarnation, Pureblood Politics, tons of Worldbuilding, Magical Theory, Noble and Ancient Houses, Goblins, Alchemy, Necromancy, Dark Magic, Spellcrafting, Ancient Runes, Wandless Magic, Divination, Arithmancy, Infinity Stones, Deathly Hallows, Afterlife Lore, Valkyrie, Asgardian Culture & Politics, the other 7 Realms, a ton of mythology references, Extraterrestrial and Wizard-Muggle Relations, a slightly less insane Voldemort, an extremely deadly Girl-Who-Lived, a very exasperated Hermione, an incredibly confused Dumbledore, a shocking number of people getting stabbed, and more.
Rating is for a variety of dark scenes, depictions of trauma, unhealthy relationships, etc, not smut.
Inspired by God of Mischief, Master of Death by CrazyArtChic (HP/MCU, Loki reincarnation into Fem!Harry), Starseed by graveltotempo (good Hela reincarnation into Fem!Tony), and Blood and Magic by L0stS0uls (Fem!Necromancer!Harry/Hermione fic, #1 on Fem!Harry/Hermione).
Intended to cover entirety of HP 1-7 and MCU up to Infinity War.