Mage Breaker is a Ranger passive effect of Favoured Enemy. You gain proficiency in Arcana and gain the 
cantrip.
Description
You have a history of battling spellcasters. Gain Proficiency with Arcana and the , which gives you 
Advantage on Attack Rolls against a creature. Wisdom is your Spellcasting Ability for this spell.
How to learn
Classes:
- Class level 1: Ranger