If there's no exiled card when Unidentified Hovership's third ability resolves (most likely because its second ability hasn't resolved yet), the ability won't do anything
It can target the Expertise spell on the stack, but the Expertise spell will become an illegal target before the free spell resolves
Similarly, it won't be subject to the turn-based action that adds a lore counter to each Saga you control at the beginning of your first main phase each turn
It was an epic collaboration between so many teams, so many artists, so many creators, to find the right blend of Magic and FINAL FANTASY
The nonland side does vary, but, judging by the cards that have already been previewed, are overcosted spells
But witches still have some identity to their little makeshift tribe despite the lack of an official subtype