Made a subclass for a rogue that would let my rogue barbarian cast spells, as I’m running a magic themed campaign in a world where everyone is born using elemental magic blah blah, but I have a DM character and his element is dusk, basically fancy for darkness. And I want to add spells to him such as dark path, black ribbon, black tentacle, etc. but some spells, notably dark path, only show up in additional spell list, not spells. Spells show up just fine on his sheet, but additional spells do not? I have it on ‘yes’ for can use magic, and I successfully gave him other spells like grease and catapult (for humorous reasons) successfully via the spells tab, but additional spell list doesn’t seem to add spells to his character sheet? I don’t get it, and I’m sorry if this is an ignorant question, I’m not very good at homebrew, nor am I a very experienced DM. This is the first session I’ve ever DMed for, and I’m really trying to get it looking nice.

Additional spell list only works for classes with defined behaviour for additional spell list because additional spells are different for Warlock and Clerics so there is additional code behind the scenes to implement the extra spell list in a class-specific manner.

Are you adding those spells as “Additional Specific Spells” under Basic Information, or as spells part of an “Additional Spell List” as part of a class feature?

It would be Additional spell list as part of a class feature like when you choose a certain subclass as Druid for example and get certain spells based off of the circle you chose

Quote from Hiraeith >>

It would be Additional spell list as part of a class feature like when you choose a certain subclass as Druid for example and get certain spells based off of the circle you chose

 
Okay, two things:

1. Unless something has drastically changed in the last couple of days, that’s not how they implement the spells for druid circles. For druid circles they get added as Additional Specific Spells under Basic Information.
2. The way they do it for druid subclasses won’t work for a rogue subclass. For a rogue subclass, if you want them to be able to learn those spells you could add them the way you’re doing it. If you want them to automatically just know those spells you need to add them differently. [Basically you have to add them under the Spells tab the same way you added grease. Please see the Homebrew Subclasses & Species FAQ, question #14 to make sure you are adding those correctly: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq#HomebrewSubclasses&SpeciesFAQ).]
   
   The reason those spells aren’t available to you under the Spells tab and are only available to you under the Additional Spell List tab of a subclass feature is because you have not purchased access to those spells. Someone is probably sharing them with you through content sharing is the only reason you can access them at all. The only reason you can even add them under the Additional Spell List tab is because of a bug in the system, you really aren’t sposta be able to add them there either. The only way to properly accomplish what you want to do is to purchase access to those spells for yourself by buying the books they’re in here on DDB.

If you want a simple way you can make a magic item that gives the spells

Again, unless they have purchased access to those spells for themselves they will not be available to add to a magic item.

I see, I’m grateful for your help! Sorry for the late reply as well. I see it was just a weird bug in the system, because I haven’t purchased anything from kobold press, thank you for your help! I’ll just homebrew some different spells to represent shadow magic for my private campaign, very grateful 🩷

Happy to help. Your other alternative is to create homebrew replicas of those spells from those books and use those instead.