So I'm trying to build a VERY fey eladrin who's grandmother was Verenestra, dive soul sorcerer (neutral domain) will eventually get her otherworldly dragonfly/faerie wings. I really want hexblades curse, eleven accuracy, and faerie fire as a combo. Character is combination support, damage dealer, battle field control (eldritch blast agonizing blast, repelling blast). I really want pact of chain to get a sprite familiar who is actually family (her cousin, how can a sprite and eladrin be cousins? "Our grandmum has a very active social life.") So Verenestra takes different forms and gets busy. Her great grandmum Titania bought out/cut a deal to take over patronage of this particular instance of the hexblade pact, that she inherited from her grandpops. I don't want to give up 9th level spells at or before level 20 because character arch is growing up to become an archfey. The best I've come up with is either taking the silverquill student background or dropping a level of hexblade to pick up a level of bard but GM's often don't allow the strixhaven backgrounds and the later would mean not getting her sprite cousin as a familiar.
In addition, choose one 1st-level spell to learn from that same list. Using this feat, you can cast the spell once at its lowest level, and you must finish a long rest before you can cast it in this way again.
That's ambiguous about whether I could use sorcerer/warlock spell slots to cast faerie fire. On one hand it says I learn the spell. But then it says I must finish a long rest before I can cast it in this way (throughout the power of the feat) again. It doesn't say explicitly whether ot not I could cast it with warlock/sorcerer spell slots.
Yep! The relevant text says you learn it, which means you can cast it using any slots you have, in addition to casting it once for free!
This is different than some other racial features, such as a Half-Elf with a Drow parentage - you can cast Faerie Fire for free once per long rest, but because it doesn't say you learn it, you can only cast it the one time.
20 ft cube is not very big. At some point a first level spell that at best gets four enemies is probably not the best combo to build around. I would go with the Magic Initiate feat. Its once per day so you will still have it in your bag of tricks, but it will force you to work at other ways to gain advantage.
More efficient is for someone else to cast it. Its a great spell for the whole party.
Well offhand I'd say the only reason I can think of why you'd want to go with divine sorc for that theme is you also want to be able to quicken BB or GFB for 2 atks sometimes... otherwise it seems like bard instead of sorc would be way more on brand for a fey themed character, you'd get faerie fire and a host of other spells that are more fey themed than divine sorc, plus you can still heal if that's important. Or, y'know, just get a ring of shooting stars.
So I'm trying to build a VERY fey eladrin who's grandmother was Verenestra, dive soul sorcerer (neutral domain) will eventually get her otherworldly dragonfly/faerie wings. I really want hexblades curse, eleven accuracy, and faerie fire as a combo. Character is combination support, damage dealer, battle field control (eldritch blast agonizing blast, repelling blast). I really want pact of chain to get a sprite familiar who is actually family (her cousin, how can a sprite and eladrin be cousins? "Our grandmum has a very active social life.") So Verenestra takes different forms and gets busy. Her great grandmum Titania bought out/cut a deal to take over patronage of this particular instance of the hexblade pact, that she inherited from her grandpops. I don't want to give up 9th level spells at or before level 20 because character arch is growing up to become an archfey. The best I've come up with is either taking the silverquill student background or dropping a level of hexblade to pick up a level of bard but GM's often don't allow the strixhaven backgrounds and the later would mean not getting her sprite cousin as a familiar.
Magic Initiate: Bard would probably be your best bet.
Relevant text is
In addition, choose one 1st-level spell to learn from that same list. Using this feat, you can cast the spell once at its lowest level, and you must finish a long rest before you can cast it in this way again.
That's ambiguous about whether I could use sorcerer/warlock spell slots to cast faerie fire. On one hand it says I learn the spell. But then it says I must finish a long rest before I can cast it in this way (throughout the power of the feat) again. It doesn't say explicitly whether ot not I could cast it with warlock/sorcerer spell slots.
Is there a definitive ruling on this?
Yep! The relevant text says you learn it, which means you can cast it using any slots you have, in addition to casting it once for free!
This is different than some other racial features, such as a Half-Elf with a Drow parentage - you can cast Faerie Fire for free once per long rest, but because it doesn't say you learn it, you can only cast it the one time.
After I asked the question here, I Googled it,
https://rpg.stackexchange.com/questions/68451/can-you-cast-a-spell-learned-from-the-magic-initiate-feat-using-spell-slots
There was a SAC clarification that says no.
I know that DM's tend not to like the strixhaven backgrounds but what about taking the strixhaven feat instead of an attribute increase?
20 ft cube is not very big. At some point a first level spell that at best gets four enemies is probably not the best combo to build around. I would go with the Magic Initiate feat. Its once per day so you will still have it in your bag of tricks, but it will force you to work at other ways to gain advantage.
More efficient is for someone else to cast it. Its a great spell for the whole party.
Well offhand I'd say the only reason I can think of why you'd want to go with divine sorc for that theme is you also want to be able to quicken BB or GFB for 2 atks sometimes... otherwise it seems like bard instead of sorc would be way more on brand for a fey themed character, you'd get faerie fire and a host of other spells that are more fey themed than divine sorc, plus you can still heal if that's important. Or, y'know, just get a ring of shooting stars.
For neutral domain the otherworldly wings are dragonfly/faerie wings.
One approach that would make it spells known would be artificer initiate. But it would be intelligence based then.
"Have you considered trade school?"