Protection of the Talisman

Source: Tasha's Cauldron of Everything p. 71

Prerequisite: Level 7, Pact of the Talisman

When the wearer of your talisman fails a saving throw, they can add a d4 to the roll, potentially turning the save into a success. This benefit can be used a number of times equal to your proficiency bonus, and all expended uses are restored when you finish a long rest.