1. No class except Wizard's have access to "named" spells.
I would let a trickster learn it from a scroll etc. Would never get to cast it but still lol
There are no words to describe how foolish I now feel for forgetting multiclassing.Uhm... maybe with multiclassing?
Combining Arcane Trickster with a few levels of Wizard, you might get to 5th-level spell slots. But you'll need to be very high level, for example Arc 15/Wiz 4, Arc 12/Wiz5 or Arc 9/Wiz 6.
There are no words to describe how foolish I now feel for forgetting multiclassing.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.