Arcane Recovery
1-Level Wizard Feature
You have learned to regain some of your magical energy by studying your Spellbook. Once per day when you finish a Short Rest, you can choose expended Spell Slots to recover. The Spell Slots can have a combined level that is equal to or less than half your Wizard level (rounded up), and none of the slots can be 6th Level or higher.
For example, if you’re a 4th-level Wizard, you can recover up to two levels worth of Spell Slots. You can recover either a 2nd-level spell slot or two 1st-level Spell Slots.