Adventurer’s Gambit

Every adventure incurs risk for reward. This spell merely accelerates the universal mechanisms this relies on. 

Upon casting, the tides and luck for the caster swing wildly and briefly in their favor. Perhaps a blocked passage happens to crumble just in time for escape.

Within the duration, the lucky moment also brings a challenge. They are usually commensurate with the lucky moment, but experiences may vary. Perhaps the collapse was because of a giant swarm of rats. 

The GM will determine how this spell materializes, but the caster should always doubt if they should ever cast it again every time.