The idea of having a "secret" sub-class in itself is amazing. it's based on your decisions as a paladin, it changes your gameplay, it changes your character's story. For me it's a definition of player's agency, which larian values a lot. So it would be pretty unfair to have only an oathbreaker as a secret sub-class. Let me suggest some "secret" sub-classes for other classes and why we could obtain them.
1. Warlock. That's simple - Hexblade. It's my favourite sub-class in PnP, but it can be actually justified in BG3 plot-wise. Remember that we are going into a shadow curse area, which is definitely somehow connected to Shadowfell. And Shadowfell is a home for Raven queen, who's generally known as a patron for hexblades. Imagine how cool it would be if we could make a pact with Raven queen during some quest and eventually become a hexblade.
2. Sorcerer. Aberrant mind - also pretty simple choice, as you can become aberrant mind if your ceromorphosis gone wrong. And it is definitely our case. Maybe our tadpole will be influenced by our innate magic and we'll be able to use its power? It would be cool
3. Wizard. Chronourgy - It could be achieved through Gale's personal quest arc. Remeber that he wanted to go to the astral plane to extract the orb, because time doesn't flow there? But what if he learns how to manipulate time? And through this knowledge he'll solve his problems with the orb
4. Bard. College of Whispers - it's not a very confident choice, as we don't have a bard-companion or a strong lore stories for collegues. I just thought that college of whispers is an outsider among other colleges, so it we be a cool variant for an evil-bard playthrough?
5. Cleric. Twilight - it ties with Shadwoheart greatly. If she restores her memories and we learn that she was a salunite(for example), that opens a path for twilight cleric. She knows some dark teachings, but doesn't follow Shar anymore - great plot and a great reward for a personal shadowheart redemption arc
6. Druid. Circle of Spores - also not a strong choice, but i thought that shadow druids in the grove could be of circle of the spores. And maybe if we ask them politely they will teach us their ways
7. Ranger. Gloomstalker - i thought that maybe astarion could be a gloomstalker in the future. He's a vampire, he hunts in the dark, darkness is his natural environment, suits the gloomstalker archetype for me
8. Rogue. Phantom - beings from Shadowfell - shadar'kai - are phantoms. They are half-ghosts and can manipulate death in a way. Remember Necromancy of Thay? Phantoms actually connected with Thay empire lore-wise. Maybe if that quest with a book would be continued, we could become phantom eventually
9. Barbarian. Path of the Beast - there are rumors that we'll have a companion who can polymorph. And i thought to myself - what class suits polymorphs most? I think it's beast barbarians as they got their body transmormed while raging. So imagine if this companion could teach us to polymorph? Sounds great to me
10. Fighter. Psi-warrior - that's Laezel's story arc. Githyanki can manipulate psi energy in combat to add to their strength. Maybe if we find the Creche some kith'rak will be able to teach Laezel and us to be a psi-warrior?
11. Monk - ?. not really sure what to pick, as i don't really know anything about monks lore and we don't have the class in the game yet. So leave your suggestions in replies
