Iron Will

You gain a +1 bonus to your Charisma score.

Your Wisdom and Charisma saving throws are interchangeable.

On your turn if you are subject to an effect that would force you make a Wisdom or Charisma saving throw at the end of your turn, you may use a bonus action at the start of your turn to resist instead.

You have advantage on saving throws to avoid the frightened, charmed, and paralyzed conditions.