Avery's Arcane Apparition

You expend a 3rd level spell slot to cast an unprepared spell of 2nd level or lower, the spell must be in your spellbook and uses its normal casting time.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can cast an unprepared spell of 3rd level or lower. The level of unprepared spell increases by 1 for every level of spell slot above 3rd.