Mage Slayer¶
Source: Player's Handbook
You gain the following benefits.
Ability Score Increase.
Increase your Strength or Dexterity score 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.