Mage Slayer
Prerequisites 4th
You gain the following benefits.
Ability Score Increase. Increase your Strength or Dexterity by 1, to a maximum of 20.
Concentration Breaker. When you damage a creature that is Concentrating, it has Disadvantage on the saving throw it makes to maintain Concentration.
Guarded Mind. If you fail an Intelligence, a Wisdom, or a Charisma saving throw, you can cause yourself to succeed instead. Once you use this benefit, you can’t use it again until you finish a Short or Long Rest.
Sources
Player’s Handbook (2024) p. 205