Quickleaf
Legend
Do deadlines not work at higher level? That's what I'd rely on if I was trying to use that idea of "spell with (narrow window of) consequences." If they can't accomplish the quest before midnight, the curse on the kingdom becomes irrevocable... that kind of thing.That's interesting. I don't know how you would contrive the situation such that there is no way the party can long rest at that level. it might make a cool climax to lower level adventure, though: the quest was to get a 50 year dead individual ressurected and the party delivers the corpse to the cleric capable of doing it, but just after the casting the BBEG shows up to capture the ressurected and the cleric and the PCs have to protect them until they can get a long rest and wipe the floor with the bad guys.
But your point about it requiring effort from the GM to create/contrive reasons why rest isn't possible is well received. I've seen that become a noticeable challenge/issue as early as 5th level when our wizard had Tiny Hut become available. I probably sound like a broken record harping on the delimiting of Tiny Hut in 5e, but for me that's the poster child of everything I dislike about D&D's "magic" – for me, nothing about that feels awe-invoking, mysterious, wondrous, or any of the other adjectives I associate with magic. But that train has left the station, circled twice, and gotten booster jets at this point.