Adumbration

Once per day (or until you take a long rest), you may devote your divining skills to prepare for the unpreparable in the coming day.

After casting this spell, you may use its effects once until you complete a long rest to cast any spell which you already know, but have not prepared. The spell cast will use its own spell slot, and must also be 1st level.

At Higher Levels

For each higher level expended in casting this spell, further potential is allowed to be foreseen. The unprepared spell may be cast at or below the level at which Adumbration was cast.