Crunch Time

When you cast this spell, the work you perform for its duration is treated as being doubly effective, but you gain a level of exhaustion. This exhaustion does not hinder or affect your work until its duration ends, it is dispelled, or it is dismissed as an action, where you suffer its affects as normal. If at any point during this spell's duration you use an action to do anything else or spend longer than 1 minute away from your work, the spell ends.

At Higher Levels: When you cast this spell using a spell slot of 4th level, its duration increases to 8 hours. When you cast this spell using a spell slot of 5th level, the efficiency of your work is tripled, but you suffer double the exhaustion.