Eldritch Master is a Warlock feature gained at level 20 in D&D 5e. At 20th level, you can draw on your inner reserve of mystical power while entreating your patron to regain expended spell slots.
At 20th level, you can draw on your inner reserve of mystical power while entreating your patron to regain expended spell slots. You can spend 1 minute entreating your patron for aid to regain all your expended spell slots from your Pact Magic feature.
Once you regain spell slots with this feature, you must finish a long rest before you can do so again.