You can use musical notes or words of power to disrupt mind-influencing effects. If you or a creature within 30 feet of you fails a saving throw against an effect that applies the Charmed or Frightened condition, you can take a Reaction to cause the save to be rerolled, and the new roll has Advantage.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.