Anti-Charm Armor

This spell does not work in conjunction with Mage Armor or Armor of Agathys. Upon casting Anti-Charm Armor while these are active causes them to be dispelled.

A protective magical barrier surrounds you, manifesting as a spectral lock and chains. While protected in this way, you have advantage on all charisma saving throws. Also, any enchantment spell of 3rd level or lower that targets you automatically fails, this includes spells that have multiple targets. If cast at 4th level or higher, the caster must make an ability check using your spellcasting ability. The DC equals 10 + your spellcasting ability modifier + proficiency mod if proficient in arcana. 

At Higher levels. When you cast this spell using a spell slot of 4th level or higher, the enchantment spell automatically fails if it's level is less than or equal to the level of the spell slot you used.